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Lenovo ThinkPad X12 Detachable Gen 1 Laptop Hardware Maintenance Manual PDF

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Summary of Content for Lenovo ThinkPad X12 Detachable Gen 1 Laptop Hardware Maintenance Manual PDF

ThinkPad X12 Detachable Gen 1 Hardware Maintenance Manual

Note: Before using this information and the product it supports, be sure to read the general information under Appendix A Notices on page 83.

Third Edition (May 2022)

Copyright Lenovo 2021, 2022.

LIMITED AND RESTRICTED RIGHTS NOTICE: If data or software is delivered pursuant to a General Services Administration GSA contract, use, reproduction, or disclosure is subject to restrictions set forth in Contract No. GS- 35F-05925.

Contents

About this manual . . . . . . . . . . . . iii

Chapter 1. Safety information . . . . . . 1 General safety . . . . . . . . . . . . . . . . 1 Electrical safety . . . . . . . . . . . . . . . . 1 Safety inspection guide . . . . . . . . . . . . . 2 Handling devices that are sensitive to electrostatic discharge . . . . . . . . . . . . . . . . . . 3 Grounding requirements . . . . . . . . . . . . 4 Safety notices (multilingual translations) . . . . . . 4

Chapter 2. Important service information . . . . . . . . . . . . . . . 21 Strategy for replacing FRUs . . . . . . . . . . 21

Strategy for replacing an M.2 solid-state drive . . . . . . . . . . . . . . . . . 21 Important notice for replacing a system board . . . . . . . . . . . . . . . . . 22 How to use error message . . . . . . . . . 22

Strategy for replacing FRUs for CTO, special-bid, and standard models. . . . . . . . . . . . . 22

Product definition . . . . . . . . . . . . 22 FRU identification . . . . . . . . . . . . 23

Chapter 3. General checkout . . . . . 25 What to do first . . . . . . . . . . . . . . . 25 Checkout guide . . . . . . . . . . . . . . . 26

Diagnosing problems . . . . . . . . . . . 26 Quick test programs . . . . . . . . . . . 26 UEFI diagnostic program . . . . . . . . . 27 Bootable diagnostic programs . . . . . . . 27

Power system checkout . . . . . . . . . . . 28 Checking the ac power adapter . . . . . . . 28 Checking the battery and operational charging . . . . . . . . . . . . . . . . 29

Chapter 4. Related service information . . . . . . . . . . . . . . . 31 Reset or restore Windows . . . . . . . . . . . 31 Passwords. . . . . . . . . . . . . . . . . 31

Power-on password . . . . . . . . . . . 31 Hard disk password . . . . . . . . . . . 31 Supervisor password . . . . . . . . . . . 32 System management password. . . . . . . 32 How to remove the power-on password and system management password . . . . . . . 32 How to remove the hard disk password. . . . 33

Power management . . . . . . . . . . . . . 34 Sleep mode . . . . . . . . . . . . . . 34

Hibernation mode . . . . . . . . . . . . 34 Symptom-to-FRU index . . . . . . . . . . . 34

Numeric error codes . . . . . . . . . . . 35 Error messages . . . . . . . . . . . . . 37 Beep symptoms . . . . . . . . . . . . . 37 No-beep symptoms . . . . . . . . . . . 39 LCD-related symptoms . . . . . . . . . . 39 Intermittent problems. . . . . . . . . . . 40 Undetermined problems . . . . . . . . . 40

Chapter 5. Special keys . . . . . . . . 43

Chapter 6. Locations . . . . . . . . . 45 Locating computer controls, connectors, and indicators . . . . . . . . . . . . . . . . . 45 Locating FRUs and CRUs . . . . . . . . . . . 46

Major FRUs . . . . . . . . . . . . . . 48 Miscellaneous parts and other FRUs . . . . . 50 Connector and cable guide . . . . . . . . 50

Looking up FRU information . . . . . . . . . . 51

Chapter 7. FRU replacement notices . . . . . . . . . . . . . . . . . 53 Service tool kit . . . . . . . . . . . . . . . 53 Screw notices . . . . . . . . . . . . . . . 53 Retaining serial numbers . . . . . . . . . . . 54

Restoring the serial number of the system unit . . . . . . . . . . . . . . . . . . 54 Retaining the UUID. . . . . . . . . . . . 55 Reading or writing the ECA information . . . . 56

Chapter 8. Removing or replacing a FRU. . . . . . . . . . . . . . . . . . . 57 General guidelines. . . . . . . . . . . . . . 57 Before servicing the computer . . . . . . . . . 58

Removing external devices . . . . . . . . 58 Disabling the built-in battery . . . . . . . . 58 Removing the nano-SIM card and the nano- SIM-card tray (for selected models) . . . . . 58

Removing a major FRU . . . . . . . . . . . . 59 1010 LCD module . . . . . . . . . . . . 59 1020 Built-in battery . . . . . . . . . . . 61 1030 Kickstand and hinges . . . . . . . . 63 1040 LCD cable . . . . . . . . . . . . . 64 1050 Pogo pin cable . . . . . . . . . . . 64 1060 Volume board and cable . . . . . . . 65 1070 Hook holder for bezel . . . . . . . . 66 1080 Security-lock bracket . . . . . . . . 67

Copyright Lenovo 2021, 2022 i

1090 USB-C board bracket . . . . . . . . 67 1100 USB-C board and cable . . . . . . . 68 1110 Thermal fan assembly . . . . . . . . 69 1120 P-sensor cable . . . . . . . . . . . 70 1130 M.2 solid-state drive . . . . . . . . . 70 1140 Speakers . . . . . . . . . . . . . 71 1150 Wireless-WAN card (for selected models) . . . . . . . . . . . . . . . . 71 1160 Power board and cable . . . . . . . . 72 1170 I/O bracket. . . . . . . . . . . . . 73 1180 NFC module, NFC module cable, and NFC antenna (for selected models) . . . . . 73

1190 Webcam privacy shutter . . . . . . . 74 1200 Front camera module . . . . . . . . 75 1210 Rear camera . . . . . . . . . . . . 75 1220 Microphone assembly . . . . . . . . 76 1230 Front camera bracket . . . . . . . . 76 1240 System board . . . . . . . . . . . 77 1250 Wireless-LAN antenna assembly . . . . 78 1260 Wireless-WAN antenna assembly (for selected models) . . . . . . . . . . . . 80

Appendix A. Notices. . . . . . . . . . 83

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About this manual

This manual contains service and reference information for ThinkPad X12 Detachable Gen 1, machine types (MT): 20UW and 20UV.

Use this manual along with the advanced diagnostic tests to troubleshoot problems.

Important:

This manual is intended only for trained service technicians who are familiar with ThinkPad products. Use this manual along with the advanced diagnostic tests to troubleshoot problems effectively.

Depending on the model, some hardware configuration and software programs might not be available on the computer. Some statements in this manual might not be applicable to the computer.

Before servicing a ThinkPad product, be sure to read all the information under Chapter 1 Safety information on page 1 and Chapter 2 Important service information on page 21.

Copyright Lenovo 2021, 2022 iii

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Chapter 1. Safety information

This chapter presents following safety information that you must be familiar with before you service a ThinkPad notebook computer. General safety on page 1 Electrical safety on page 1 Safety inspection guide on page 2 Handling devices that are sensitive to electrostatic discharge on page 3 Grounding requirements on page 4 Safety notices (multilingual translations) on page 4

General safety Follow these rules to ensure general safety: Observe good housekeeping in the area of the machines during and after maintenance. When lifting any heavy object:

1. Make sure that you can stand safely without slipping.

2. Distribute the weight of the object equally between your feet.

3. Use a slow lifting force. Never move suddenly or twist when you attempt to lift.

4. Lift by standing or by pushing up with your leg muscles; this action removes the strain from the muscles in your back. Do not attempt to lift any object that weighs more than 16 kg (35 lb) or that you think is too heavy for you.

Do not perform any action that causes hazards to the customer, or that makes the equipment unsafe. Before you start the machine, make sure that other service technicians and the customer's personnel are

not in a hazardous position. Place removed covers and other parts in a safe place, away from all personnel, while you are servicing the

machine. Keep your toolcase away from walk areas so that other people will not trip over it. Do not wear loose clothing that can be trapped in the moving parts of a machine. Make sure that your

sleeves are fastened or rolled up above your elbows. If your hair is long, fasten it. Insert the ends of your necktie or scarf inside clothing or fasten it with a nonconductive clip, about 8

centimeters (3 inches) from the end. Do not wear jewelry, chains, metal-frame eyeglasses, or metal fasteners for your clothing.

Attention: Metal objects are good electrical conductors. Wear safety glasses when you are hammering, drilling, soldering, cutting wire, attaching springs, using

solvents, or working in any other conditions that might be hazardous to your eyes. After service, reinstall all safety shields, guards, labels, and ground wires. Replace any safety device that

is worn or defective. Reinstall all covers correctly before returning the machine to the customer. Fan louvers on the machine help to prevent overheating of internal components. Do not obstruct fan

louvers or cover them with labels or stickers.

Electrical safety Observe the following rules when working on electrical equipment.

Important: Use only approved tools and test equipment. Some hand tools have handles covered with a soft material that does not insulate you when working with live electrical currents.Many customers have, near their equipment, rubber floor mats that contain small conductive fibers to decrease electrostatic discharges. Do not use this type of mat to protect yourself from electrical shock.

Copyright Lenovo 2021, 2022 1

Find the room emergency power-off (EPO) switch, disconnecting switch, or electrical outlet. If an electrical accident occurs, you can then operate the switch or unplug the power cord quickly.

Do not work alone under hazardous conditions or near equipment that has hazardous voltages. Disconnect all power before:

Performing a mechanical inspection Working near power supplies Removing or installing main units

Before you start to work on the machine, unplug the power cord. If you cannot unplug it, ask the customer to power-off the wall box that supplies power to the machine, and to lock the wall box in the off position.

If you have to work on a machine that has exposed electrical circuits, observe the following precautions: Ensure that another person, familiar with the power-off controls, is near you.

Attention: Another person must be there to switch off the power, if necessary. Use only one hand when working with powered-on electrical equipment; keep the other hand in your

pocket or behind your back.

Attention: An electrical shock can occur only when there is a complete circuit. By observing the above rule, you may prevent a current from passing through your body.

When using testers, set the controls correctly and use the approved probe leads and accessories for that tester.

Stand on suitable rubber mats (obtained locally, if necessary) to insulate you from grounds such as metal floor strips and machine frames.

Observe the special safety precautions when you work with very high voltages; Instructions for these precautions are in the safety sections of maintenance information. Use extreme care when measuring high voltages.

Regularly inspect and maintain your electrical hand tools for safe operational condition. Do not use worn or broken tools and testers. Never assume that power has been disconnected from a circuit. First, check that it has been powered off. Always look carefully for possible hazards in your work area. Examples of these hazards are moist floors,

nongrounded power extension cables, power surges, and missing safety grounds. Do not touch live electrical circuits with the reflective surface of a plastic dental mirror. The surface is

conductive; such touching can cause personal injury and machine damage. Do not service the following parts with the power on when they are removed from their normal operating

places in a machine: Power supply units Pumps Blowers and fans Motor generators Similar units as listed above This practice ensures correct grounding of the units.

If an electrical accident occurs: Use caution; do not become a victim yourself. Switch off power. Send another person to get medical aid.

Safety inspection guide The purpose of this inspection guide is to assist you in identifying potentially unsafe conditions. As each machine was designed and built, required safety items were installed to protect users and service technicians from injury. This guide addresses only those items. You should use good judgment to identify potential safety hazards due to attachment of non-ThinkPad features or options not covered by this inspection guide.

If any unsafe conditions are present, you must determine how serious the apparent hazard could be and whether you can continue without first correcting the problem.

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Consider these conditions and the safety hazards they present: Electrical hazards, especially primary power (primary voltage on the frame can cause serious or fatal

electrical shock) Explosive hazards, such as a damaged CRT face or a bulging capacitor Mechanical hazards, such as loose or missing hardware

To determine whether there are any potentially unsafe conditions, use the following checklist at the beginning of every service task. Begin the checks with the power off, and the power cord disconnected.

Checklist: 1. Check exterior covers for damage (loose, broken, or sharp edges). 2. Power off the computer. Disconnect the power cord.

3. Check the power cord for: a. A third-wire ground connector in good condition. Use a meter to measure third-wire ground

continuity for 0.1 ohm or less between the external ground pin and the frame ground. b. The power cord should be the authorized type specified for your computer. Go to: https://

support.lenovo.com/partslookup. c. Insulation must not be frayed or worn.

4. Check for cracked or bulging batteries. 5. Remove the cover. 6. Check for any obvious non-ThinkPad alterations. Use good judgment as to the safety of any non-

ThinkPad alterations. 7. Check inside the unit for any obvious unsafe conditions, such as metal filings, contamination, water or

other liquids, or signs of fire or smoke damage. 8. Check for worn, frayed, or pinched cables.

9. Check that the power-supply cover fasteners (screws or rivets) have not been removed or tampered with.

Handling devices that are sensitive to electrostatic discharge Any computer part containing transistors or integrated circuits (ICs) should be considered sensitive to electrostatic discharge (ESD.) ESD damage can occur when there is a difference in charge between objects. Protect against ESD damage by equalizing the charge so that the machine, the part, the work mat, and the person handling the part are all at the same charge.

Notes: 1. Use product-specific ESD procedures when they exceed the requirements noted here.

2. Make sure that the ESD protective devices you use have been certified (ISO 9000) as fully effective.

When handling ESD-sensitive parts: Keep the parts in protective packages until they are inserted into the product. Avoid contact with other people. Wear a grounded wrist strap against your skin to eliminate static on your body. Prevent the part from touching your clothing. Most clothing is insulative and retains a charge even when

you are wearing a wrist strap. Use a grounded work mat to provide a static-free work surface. The mat is especially useful when

handling ESD-sensitive devices. Select a grounding system, such as those listed below, to provide protection that meets the specific

service requirement.

Note: The use of a grounding system to guard against ESD damage is desirable but not necessary. Attach the ESD ground clip to any frame ground, ground braid, or green-wire ground.

Chapter 1. Safety information 3

When working on a double-insulated or battery-operated system, use an ESD common ground or reference point. You can use coax or connector-outside shells on these systems.

Use the round ground prong of the ac plug on ac-operated computers.

Grounding requirements Electrical grounding of the computer is required for operator safety and correct system function. Proper grounding of the electrical outlet can be verified by a certified electrician.

Safety notices (multilingual translations) The safety notices in this section are provided in the following languages: English Arabic Brazilian Portuguese French German Hebrew Japanese Korean Spanish Traditional Chinese

DANGER

DANGER

DANGER

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DANGER

DANGER

DANGER

DANGER

DANGER

Chapter 1. Safety information 5

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PERIGO

PERIGO

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PERIGO

PERIGO

PERIGO

PERIGO

PERIGO

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PERIGO

DANGER

DANGER

DANGER

DANGER

Chapter 1. Safety information 9

DANGER

DANGER

DANGER

DANGER

VORSICHT

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VORSICHT

VORSICHT

VORSICHT

VORSICHT

Chapter 1. Safety information 11

VORSICHT

VORSICHT

VORSICHT

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Chapter 1. Safety information 13

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Chapter 1. Safety information 15

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Chapter 1. Safety information 17

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Chapter 1. Safety information 19

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Chapter 2. Important service information

This chapter introduces following important service information that applies to all machine types supported by this manual: Strategy for replacing FRUs on page 21

Strategy for replacing an M.2 solid-state drive on page 21 Important notice for replacing a system board on page 22 How to use error message on page 22

Strategy for replacing FRUs for CTO, special-bid, and standard models on page 22 Product definition on page 22 FRU identification on page 23

Important: Advise customers to contact the Lenovo Support Web site at https://support.lenovo.com to view the

software fixes, download the drivers, and follow the on-screen instructions to install the drivers. For additional assistance, customers might call the Lenovo Customer Support Center. Telephone numbers for the Lenovo Support Center are available at: https://pcsupport.lenovo.com/supportphonelist

Service training documents for Lenovo authorized service technicians are available at the following Web site. The disassembly and reassembly videos that show the FRU removal and replacement procedures are contained in the documents. https://www.lenovoservicetraining.com/ion/

Strategy for replacing FRUs Before replacing parts:

Ensure that all software fixes, drivers, and UEFI BIOS downloads are installed before replacing any FRUs listed in this manual.

After a system board is replaced, ensure that the latest UEFI BIOS is loaded to the system board before completing the service action.

To download software fixes, drivers, and UEFI BIOS, go to https://support.lenovo.com and follow the instructions on the screen.

Use the following strategy to prevent unnecessary expense for replacing and servicing FRUs: If you are instructed to replace a FRU but the replacement does not correct the problem, reinstall the

original FRU before you continue. Some computers have both a processor board and a system board. If you are instructed to replace either

the processor board or the system board, and replacing one of them does not correct the problem, reinstall that board, and then replace the other one.

If an adapter or a device consists of more than one FRU, any of the FRUs may be the cause of the error. Before replacing the adapter or device, remove the FRUs, one by one, to see if the symptoms change. Replace only the FRU that changed the symptoms.

Strategy for replacing an M.2 solid-state drive Always try to run a low-level format before replacing an M.2 solid-state drive (SSD). This will cause all customer data on the M.2 SSD to be lost. Be sure that the customer has a current backup of the data before doing this task.

Copyright Lenovo 2021, 2022 21

Attention: The drive startup sequence in the computer you are servicing may have been changed. Be extremely careful during write operations such as copying, saving, or formatting. If you select an incorrect drive, data or programs can be overwritten.

Important notice for replacing a system board Some components mounted on a system board are very sensitive. Improper handling of a system board can cause damage to those components, and may cause a system malfunction.

After replacing the system board, use the Maintenance Utility to bind the model type, serial number, and Brand ID of the computer with the new system board. Refer to https://support.lenovo.com/us/en/solutions/ HT506954 for instructions on how to do that. As an alternative, you also can use the Golden Key U1 tool for that purpose. Refer to https://support.lenovo.com/us/en/solutions/ht507251 for instructions.

Attention: When handling a system board: Do not drop a system board or apply any excessive force to it. Avoid rough handling of any kind. Avoid bending a system board and hard pushing to prevent cracking at each BGA (Ball Grid Array)

chipset.

How to use error message Use the error codes displayed on the screen to diagnose failures. If more than one error code is displayed, begin the diagnosis with the first error code. Whatever causes the first error code may also cause false error codes. If no error code is displayed, see whether the error symptom is listed in the Symptom-to-FRU Index for the computer you are servicing.

Strategy for replacing FRUs for CTO, special-bid, and standard models This topic provides information about the model types and FRU identification.

Product definition This topic introduces different model types and how to identify each type.

Dynamic configure-to-order (CTO) model

This model provides the ability for a customer to configure a Lenovo solution from a Web Site, and have this configuration sent to fulfillment, where it is built and shipped directly to the customer. The machine label and eSupport will load these products as the 4-character MT, 4-character model, and 2-character country code. The model is CTO1 and the default country code is WW (example: 20A7CTO1WW).

Special-bid model

This is a unique configuration that has been negotiated between Lenovo and the customer. A unique machine type model (MTM) consists of a 4-character MT, a 4-character model, and a numeric 2-character country code is provided to the customer to place orders (example: 20A7000955). The country code assigned is numeric and does not designate a specific country or region. The custom model factsheet for the MTM indicates which country the special bid MTM is set up for. Special-bid offering is not generally announced.

Standard model

Standard models (fixed configuration) are announced and offered to all customers. The MTM portion of the machine label consists of a 4-character MT, a 4-character model, and an alphabetic 2-character country code. The country code assigned is alphabetic and represents a designated country or region (example: 20A70009UK).

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FRU identification To identify FRUs for a product, do the following:

1. Go to https://support.lenovo.com/partslookup.

2. Type the Machine Type in the corresponding field to get a general FRU list, or type the Serial Number for more detailed FRU information.

Chapter 2. Important service information 23

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Chapter 3. General checkout

This chapter introduces following information: What to do first on page 25 Checkout guide on page 26

Diagnosing problems on page 26 Quick test programs on page 26 UEFI diagnostic program on page 27 Bootable diagnostic programs on page 27

Power system checkout on page 28

Before you go to the checkout guide, be sure to read the following important notes.

Important notes: Only certified trained personnel should service the computer. Before replacing any FRU, read the entire page on removing and replacing FRUs. When you replace FRUs, it is recommended use new nylon-coated screws. Be extremely careful during such write operations as copying, saving, or formatting. The sequence

of the drives in the computer that you are servicing might have been altered. If you select an incorrect drive, data or programs might be overwritten.

Replace a FRU only with another FRU of the correct model. When you replace a FRU, ensure that the model of the machine and the FRU part number are correct.

A FRU should not be replaced because of a single, unreproducible failure. Single failures can occur for various reasons that have nothing to do with a hardware defect, such as cosmic radiation, electrostatic discharge, or software errors. Consider replacing a FRU only when a problem recurs. If you suspect that a FRU is defective, clear the error log and run the test again. If the error does not recur, do not replace the FRU.

Be careful not to replace a nondefective FRU.

What to do first When you return a FRU, you must include the following information in the parts exchange form or parts return form that you attach to it:

1. Name and phone number of service technician 2. Date of service 3. Date on which the machine failed

4. Date of purchase 5. Failure symptoms, error codes appearing on the display, and beep symptoms 6. Procedure index and page number in which the failing FRU was detected 7. Failing FRU name and part number

8. Machine type, model number, and serial number 9. Customer's name and address

Note: During the warranty period, the customer may be responsible for repair costs if the computer damage was caused by misuse, accident, modification, unsuitable physical or operating environment, or improper maintenance by the customer. Following is a list of some common items that are not covered under warranty and some symptoms that might indicate that the system was subjected to stress beyond normal use.

Before checking problems with the computer, determine whether the damage is covered under the warranty by referring to the following list:

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The following are not covered under warranty: LCD panel cracked from the application of excessive force or from being dropped Scratched (cosmetic) parts Distortion, deformation, or discoloration of the cosmetic parts Plastic parts, latches, pins, or connectors that have been cracked or broken by excessive force Damage caused by liquid spilled into the system Damage caused by the improper insertion of a PC card or the installation of an incompatible card Improper disc insertion or use of an optical drive Fuses blown by attachment of a nonsupported device Forgotten computer password (making the computer unusable) Sticky keys caused by spilling a liquid onto the keyboard Use of an incorrect ac power adapter on laptop products

The following symptoms might indicate damage caused by nonwarranted activities: Missing parts might be a symptom of unauthorized service or modification. Check for obvious damage to a hard disk drive. If the spindle of a hard disk drive becomes noisy, the hard

disk drive might have been dropped or subject to excessive force.

Checkout guide Use the following procedures as a guide in identifying and correcting problems with the ThinkPad notebook computers.

Note: The diagnostic tests are intended to test only ThinkPad products. The use of non-ThinkPad products, prototype cards, or modified options can lead to false indications of errors and invalid system responses.

1. Identify the failing symptoms in as much detail as possible. 2. Verify the symptoms. Try to re-create the failure by running the diagnostic test or by repeating the

operation.

Diagnosing problems Many computer problems can be solved without outside assistance. If you experience a problem with your computer, the first place to start is the troubleshooting information in your computer documentation. If you suspect a software problem, see the documentation, including readme files and help information systems, that come with the operating system or program.

The Vantage app is preinstalled on your computer. It combines system information collection, security status, and support information.

Note: If you are unable to isolate and repair the problem yourself after running the program, save and print the log files created by the program. You need the log files when you speak to a Lenovo technical support representative.

The troubleshooting information or the diagnostic programs might tell you that you need additional or updated device drivers or other software. You can get the latest technical information and download device drivers and updates from the Lenovo Support Web site at:

https://support.lenovo.com

For additional information, see the help system of the program.

Quick test programs Run quick test programs to troubleshoot and resolve computer problems, especially when the computer does not have the Vantage app installed.

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To download and install a quick test program, go to https://www.lenovo.com/diags, and follow the instructions on the Web site.

To run a test using quick test program, do the following:

1. Go to the C:\SWTOOLS\ldiag directory.

2. Double-click the lsc_lite.exe file.

3. When the User Account Control window opens, click Yes.

4. Select the device class to be tested.

5. Select the devices to be tested.

6. Select the test to be performed.

7. Follow the instructions on the screen to start the test. When a problem is detected, information messages are displayed. Refer to the messages to troubleshoot the problem.

UEFI diagnostic program A UEFI diagnostic program is preinstalled on the computer. It enables you to test internal storage devices, view system information, and check and recover bad sectors on internal storage devices.

To run the UEFI diagnostic program, do the following:

1. Turn on the computer. If the computer cannot be turned on, go to Power system checkout on page 28, and check the power sources. If an error code is displayed, go to Symptom-to-FRU index on page 34 for error code descriptions and troubleshooting hints.

2. When the ThinkPad logo is displayed, repeatedly press and release the F10 key. The main screen of the UEFI diagnostic program is displayed.

3. Follow the instructions on the screen to use the diagnostic program.

The following table displays the main items of the UEFI diagnostic program. Depending on the model, the items might differ slightly.

Table 1. Items on the main screen of the UEFI diagnostic program

Tests Tools

Memory quick test Memory extended test Memory bit fade test (180 min) Quick storage device test LCD test PCI-e test Motherboard buses test Exit application

System information Generate configuration file Execute from configuration file Recover bad sectors tool

Note: The recover bad sectors tool is only available on computers that have hard disk drives installed.

Bootable diagnostic programs If the computer you are servicing is not installed with the UEFI diagnostic program, you can download a bootable diagnostic program from the Lenovo Support Web site. The bootable diagnostic programs enable you to test computer memory and internal storage devices, view system information, and check and recover the internal storage devices. To use the bootable diagnostic programs, you can create a bootable diagnostic medium on a USB device or CD.

To create a bootable diagnostic medium, do the following:

Chapter 3. General checkout 27

1. Go to https://www.lenovo.com/diags.

2. Click Lenovo Bootable Diagnostics.

3. Follow the instructions on the Web site to create a bootable diagnostic medium on a USB device or CD.

To use the diagnostic medium you have created, do one of the following: If you have created the bootable diagnostic medium on a USB device, do the following:

1. Attach the USB device to the computer.

2. Turn on the computer. If the computer cannot be turned on, go to Power system checkout on page 28, and check the power sources. If an error code is displayed, go to Symptom-to-FRU index on page 34 for error code descriptions and troubleshooting hints.

3. When the ThinkPad logo is displayed, repeatedly press and release the F12 key. When the Boot Menu window opens, release the F12 key.

4. Use the arrow keys to select USB HDD and then press Enter. The diagnostic program will be launched automatically.

5. Follow the instructions on the screen to use the diagnostic program. If you have created the bootable diagnostic medium on a CD, do the following:

1. Turn on the computer. If the computer cannot be turned on, go to Power system checkout on page 28, and check the power sources. If an error code is displayed, go to Symptom-to-FRU index on page 34 for error code descriptions and troubleshooting hints.

2. Insert the CD into the external optical drive.

3. Restart the computer.

4. When the ThinkPad logo is displayed, repeatedly press and release the F12 key. When the Boot Menu window opens, release the F12 key.

5. Use the arrow keys to select ATAPI CDx (x: 0, 1, ...) and then press Enter. The diagnostic program will be launched automatically.

6. Follow the instructions on the screen to use the diagnostic program.

Power system checkout To verify if a battery and an ac power adapter are functional, do the following:

1. Turn off the computer. 2. Connect the ac power adapter. 3. Turn on the computer. If the computer can be turned on, it means that either the battery or the ac power

adapter is functional. 4. Insert a straightened paper clip into the emergency reset hole to reset the computer. If the computer is

still powered on, it means that the ac power adapter is functional. 5. Turn off the computer. 6. Disconnect the ac power adapter and turn on the computer. If the computer can be turned on, it means

the battery is functional.

If you suspect a power problem, see the appropriate one of the following power supply checkouts: Checking the ac power adapter on page 28 Checking the battery and operational charging on page 29

Checking the ac power adapter You are here because the computer fails only when the ac power adapter is used. If the power problem occurs only when the docking station or the port replicator is used, replace the

docking station or the port replicator. If the system status indicator does not blink three times when an ac power source is connected, check the

power cord of the ac power adapter for correct continuity and installation.

28 ThinkPad X12 Detachable Gen 1 Hardware Maintenance Manual

If the computer does not charge during operation, go to Checking the battery and operational charging on page 29.

Note: Noise from the ac power adapter does not always indicate a defect.

Checking the USB-C type ac power adapter

To check the USB-C type ac power adapter, do the following:

1. Connect the computer to a power outlet and turn on the computer.

2. Start the Vantage app, and then click Hardware Settings Power. The ac power adapter information is displayed.

Ensure that you use the USB-C type ac power adapter that is shipped with the computer to provide enough power to the computer. Otherwise, a message will be displayed, prompting you that the computer will not be charged or will be charged slowly.

Checking the battery and operational charging

Checking the battery

This system supports only batteries specially designed for this specific system and manufactured by Lenovo or an authorized builder. The system does not support unauthorized batteries or batteries designed for other systems. If an unauthorized battery or a battery designed for another systems is installed, the system will not charge.

Attention: Lenovo has no responsibility for the performance or safety of unauthorized batteries, and provides no warranties for failures or damage arising out of their use.

Move your pointer to the battery-status icon in the Windows notification area to check the battery status. The battery-status icon displays the percentage of battery power remaining and how long you can use your computer before you must charge the battery.

Checking the operational charging

To check whether the battery charges properly during operation, do the following:

1. Discharge the battery until the remained battery power is less than 50%.

2. Perform operational charging. Click the battery status icon in the Windows notification area to display detailed battery information. If it indicates that the battery is not charging, replace the battery.

3. Check the battery status again. If the same error still exists, replace the system board.

Chapter 3. General checkout 29

30 ThinkPad X12 Detachable Gen 1 Hardware Maintenance Manual

Chapter 4. Related service information

This chapter presents following information: Reset or restore Windows on page 31 Passwords on page 31 Power management on page 34 Symptom-to-FRU index on page 34

Service Web site: When the latest maintenance diskette and the system program service diskette become available, they will be posted on https://support.lenovo.com

Reset or restore Windows To reset or restore Windows, refer to the information below

Use Lenovo recovery options.

1. Go to https://support.lenovo.com/HowToCreateLenovoRecovery.

2. Follow the on-screen instructions.

Use Window recovery options.

1. Go to https://pcsupport.lenovo.com.

2. Detect your computer or manually select your computer model.

3. Click Diagnostics Operating system Diagnostics and then follow the on-screen instructions.

Passwords As many as four passwords may be needed for any ThinkPad notebook computer: the power-on password, the hard disk password, the supervisor password, and the system management password.

If any of these passwords has been set, a prompt for it will be displayed on the screen whenever the computer is turned on. The computer does not start until the password is entered.

Note: If only a supervisor password is set, the password prompt will not be displayed when the operating system is started.

Power-on password A power-on password protects the system from being powered on by an unauthorized person. The password must be entered before an operating system can be started. For instructions on how to remove the power-on password, see How to remove the power-on password and system management password on page 32.

Hard disk password There are two kinds of hard disk passwords: User hard disk password - for the user Master hard disk password - for the system administrator, who can use it to get access to the hard disk

even if the user has changed the user hard disk password

Note: There are two modes for the hard disk password: User only and Master + User. The Master + User mode requires two hard disk passwords; the system administrator enters both in the same operation. The system administrator then provides the user hard disk password to the system user.

Copyright Lenovo 2021, 2022 31

Attention: If the user hard disk password has been forgotten, check whether a master hard disk password has been set. If it has, it can be used for access to the hard disk drive. If no master hard disk password is available, neither Lenovo nor Lenovo authorized service technicians provide any services to reset either the user or the master hard disk password, or to recover data from the hard disk drive. The hard disk drive can be replaced for a scheduled fee.

For how to remove the hard disk password, see How to remove the hard disk password on page 33.

Supervisor password The supervisor password protects the system information stored in the ThinkPad Setup program. It provides the following security features:

If only a supervisor password is set, a password prompt is displayed when you try to start the ThinkPad Setup program. Unauthorized users cannot change most of the system configuration options in the ThinkPad Setup program without the password.

The system administrator can use the supervisor password to access a computer even if the user of that computer has set a power-on password. The supervisor password overrides the power-on password.

The system administrator can set the same supervisor password on many ThinkPad notebook computers to make administration easier.

Attention: If the supervisor password has been forgotten and cannot be made available to the service technician, there is no service procedure to reset the password. The system board must be replaced for a scheduled fee.

System management password The system management password can also protect the system information stored in UEFI BIOS like a supervisor password, but it has lower authority by default. The system management password can be set through the UEFI BIOS menu or through Windows Management Instrumentation (WMI) with the Lenovo client-management interface.

You can enable the system management password to have the same authority as the supervisor password to control security related features. To customize the authority of the system management password through the UEFI BIOS menu:

1. Enter the UEFI BIOS menu.

2. Select Security Password System Management Password Access Control.

3. Follow the on-screen instructions.

If you have set both the supervisor password and the system management password, the supervisor password overrides the system management password. If you have set both the system management password and the power-on password, the system management password overrides the power-on password.

How to remove the power-on password and system management password To remove a power-on password and system management password, do the following:

If no supervisor password has been set, do the following to remove the power-on password:

1. Turn off the computer and disconnect the computer from ac power and all connected cables. 2. Insert a straightened paper clip into the emergency-reset hole for more than 10 seconds. 3. Reconnect all power resources and then the system starts automatically.

32 ThinkPad X12 Detachable Gen 1 Hardware Maintenance Manual

4. Wait one to two minutes until the POST ends. 5. The error code 0271 appears on the screen. The power-on password and system management

password have been removed.

6. Tap F1, and then select Date/Time set System Date and System Time to set system date and time.

If a supervisor password has been set and is known to the service technician, do the following to remove the power-on password and system management password:

1. Turn on the computer. 2. When the ThinkPad logo is displayed, immediately tap F1. 3. Type the supervisor password to enter the ThinkPad Setup program. 4. Select Security Password Power-On Password or System Management Password.

5. Enter the current supervisor password in the Enter Current Password field. Then leave the Enter New Password field blank, and tap Save.

6. In the Changes have been saved window, tap Continue.

7. Tap F10 to save changes and exit the ThinkPad Setup program. The power-on password and system management password have been removed.

How to remove the hard disk password Attention: If User only mode is selected and the user hard disk password has been forgotten and cannot be made available to the service technician, neither Lenovo nor Lenovo authorized service technicians provide any services to reset the user hard disk passwords, or to recover data from the hard disk drive. To put the system back to operational status, the only Lenovo and Lenovo-authorized service solution would be to replace the hard disk drive (HDD) or SSD with a scheduled fee.

To remove a user hard disk password that has been forgotten, when the supervisor password and master hard disk password are known, do the following:

1. Turn on the computer. 2. When the ThinkPad logo comes up, immediately press F1 to enter the ThinkPad Setup program. When

the power-on password icon is displayed on the screen, enter either the power-on password or the supervisor password.

3. When the user hard disk password icon is displayed on the screen, press F1. The master hard disk password icon is displayed.

4. Enter the master hard disk password to enter the ThinkPad Setup program. 5. Select Security. 6. Select Password.

7. Select Hard-disk x password, where x is the letter of the hard disk drive. A pop-up window opens. 8. Select Master hard disk password. 9. Enter the current master hard disk password in the Enter Current Password field. Then leave the Enter

New Password field blank, and tap Save.

10. In the Changes have been saved window, tap Continue. 11. Press F10 to save changes and exit the ThinkPad Setup program. The user hard disk password and the

master hard disk password have been removed.

Chapter 4. Related service information 33

Power management

Sleep mode When the computer enters sleep mode, the screen goes blank and all internal devices are still powered on with lower power consumption.

To enter sleep mode, press Fn+4 or open the Start menu and click Power, and then click Sleep.

In certain circumstances, the computer goes into sleep mode automatically:

After a period of inactivity specified in power plan settings

When the battery power is low

To resume the computer from sleep mode, press the power button.

Also, in either of the following events, the computer automatically returns from sleep mode and resumes operation:

The ring indicator (RI) is signaled by a serial device or a PC Card device.

The time set on the resume timer elapses.

Note: The computer does not accept any input immediately after it enters sleep mode. Wait a few seconds before taking any action to reenter operation mode.

Hibernation mode In hibernation mode, the following occurs:

The system status, RAM, VRAM, and setup data are stored on the hard disk.

The system is powered off.

Note: If the computer enters the hibernation mode while it is docked to the docking station, do not undock it before resuming normal operation. If you do undock it and then try to resume normal operation, you will get an error message, and you will have to restart the system.

If you have defined one of the following actions as the event that causes the system to go into hibernation mode, perform that action. Closing the lid. Pressing the power button.

Also, the computer goes into hibernation mode automatically after a period of inactivity specified in power plan settings.

When the power is turned on, the computer returns from hibernation mode and resumes operation. The hibernation file in the boot record on the hard disk drive is read, and system status is restored from the hard disk drive.

Symptom-to-FRU index This section contains following information: Numeric error codes on page 35 Error messages on page 37 Beep symptoms on page 37

34 ThinkPad X12 Detachable Gen 1 Hardware Maintenance Manual

No-beep symptoms on page 39 LCD-related symptoms on page 39 Intermittent problems on page 40 Undetermined problems on page 40

The symptom-to-FRU index in this section lists symptoms and errors and their possible causes. The most likely cause is listed first, in boldface type.

Note: Do the FRU replacement or other actions in the sequence shown in the column headed FRU or action, in sequence. If replacing a FRU does not solve the problem, put the original part back in the computer. Do not replace a nondefective FRU.

This index can also help you determine, during regular servicing, what FRUs are likely to need to be replaced next.

A numeric error is displayed for each error detected in POST or system operation. In the displays, n can be any number.

If no numeric code is displayed, check the narrative descriptions of symptoms. If the symptom is not described there, go to Intermittent problems on page 40.

Note: For a device not supported by diagnostic codes in the ThinkPad notebook computers, see the manual for that device.

Numeric error codes Table 2. Numeric error codes

Symptom or error FRU or action, in sequence

0177 Bad SVP data, stop POST taskThe checksum of the supervisor password in the EEPROM is not correct.

System board

0183 Bad CRC of Security Settings in EFI Variable. Enter the ThinkPad Setup program.

1. Run the ThinkPad Setup program, and then save current setting by pressing F10.

2. System board

0187 EAIA data access errorThe access to EEPROM is failed. System board

0188 Invalid RFID Serialization Information Area. System board

0189 Invalid RFID configuration information areaThe EEPROM checksum is not correct.

System board

0190 Critical low-battery error

1. Charge the battery. 2. Battery

0191 System SecurityInvalid Remote Change requested.

1. Run the ThinkPad Setup program, and then save current setting by pressing F10.

2. System board

0199 System Security Security password retry count exceeded.

1. Run the ThinkPad Setup program, and then save the current setting by pressing F10.

2. System board

0270 Real Time Clock Error. System Real Time Clock is not functional. Have the

computer serviced.

Chapter 4. Related service information 35

Table 2. Numeric error codes (continued)

Symptom or error FRU or action, in sequence

0271 Check Date and Time settings. Neither the date nor the time is set in the

computer. Set the date and time, using the ThinkPad Setup program.

1802 Unauthorized network card is plugged inTurn off and remove the network card.

1. Remove wireless network card. 2. System board

1820 More than one external fingerprint reader is attached. Power off and remove all but the reader that you set up within your main operating system.

Remove all but the reader that you set up for the authentication.

2100 Detection error on HDD0 (Main HDD)

1. Reseat the hard disk drive. 2. Hard disk drive 3. System board

2101 Detection error on SSD1 (M.2)

1. Reseat the M.2 solid-state drive. 2. M.2 solid-state drive 3. System board

2102 Detection error on SSD2 (M.2)

1. Reseat the M.2 solid-state drive. 2. M.2 solid-state drive 3. System board

2110 Read error on HDD0 (Main HDD)

1. Reseat the hard disk drive. 2. Hard disk drive 3. System board

2111 Read error on SSD1 (M.2)

1. Reseat the M.2 solid-state drive. 2. Main M.2 solid-state drive 3. System board

2112 Read error on SSD2 (M.2)

1. Reseat the M.2 solid-state drive. 2. Main M.2 solid-state drive 3. System board

2200 Machine Type and Serial Number are invalid. System board

2201 Machine UUID is invalid. System board

2202 Brand Name is invalid. Have the computer serviced.

2203 System configuration is invalid. Have the computer serviced.

2204 System configuration data is invalid. Have the computer serviced.

36 ThinkPad X12 Detachable Gen 1 Hardware Maintenance Manual

Error messages Table 3. Error messages

Symptom or error FRU or action, in sequence

Fan error 1. Fan 2. Thermal grease 3. System board

Thermal sensing error System board

Bottom cover tamper detection error System board

Error: The non-volatile system UEFI variable storage is nearly full.

Note: This error indicates that the operating system or programs cannot create, modify, or delete data in the non-volatile system UEFI variable storage due to insufficient storage space after POST.

The non-volatile system UEFI variable storage is used by the UEFI BIOS and by the operating system or programs. This error occurs when the operating system or programs store large amounts of data in the variable storage. All data needed for POST, such as BIOS setup settings, chipset, or platform configuration data, are stored in a separate UEFI variable storage. Press F1 after the error message is displayed to enter ThinkPad Setup. A dialog asks the user for confirmation to clean up the storage. If the user selects Yes, all data that were created by the operating system or programs will be deleted except global variables defined by the Unified Extensible Firmware Interface Specification. If the user selects No, all data will be kept, but the operating system or programs will not be able to create, modify, or delete data in the storage.

If this error happens at a service center, Lenovo authorized service personnel will clean up the non-volatile system UEFI variable storage using the preceding solution.

Beep symptoms Lenovo SmartBeep technology enables you to decode beep errors with your smartphone when a black screen occurs with beeps from your computer. To decode the beep error with Lenovo SmartBeep technology, do the following:

1. Go to https://support.lenovo.com/smartbeep or scan the following QR Code.

2. Download the proper diagnostic app and install it on your smartphone.

Chapter 4. Related service information 37

3. Run the diagnostic app and place the smartphone near the computer.

4. Press the Fn key on your computer to emit the beep again. The diagnostic app decodes the beep error and shows possible solutions on the smartphone.

The following section describes some beep errors and the corresponding solutions.

Note: Do not attempt to service a product yourself unless instructed to do so by the Customer Support Center or product documentation. Only use a Lenovo-authorized service provider to repair your product.

Error codes Solutions

0001: Reset error (platform reset not de-asserted) 1. Remove the ac power adapter and the removable battery if your computer has one. Then, reset the computer by doing one of the following:

For models with the emergency-reset hole, insert a straightened paper clip into the emergency-reset hole. Wait for one minute. Then, reconnect all power resources and restart the computer.

For models without the emergency-reset hole, press and hold the power button for about seven seconds. Then, reconnect to all power resources and restart the computer.

2. If step 1 does not work, replace the system board (service provider only).

0002: Internal bus error Replace the system board (service provider only).

0281: General embedded controller error Replace the system board (service provider only).

0282: Memory module error 1. Reinstall or replace the memory module.

2. If step 1 does not work, replace the system board (service provider only).

0283: PCI resource error 1. Remove PCIe devices (the M.2 card, PCIe card, and so on) (service provider only).

2. If step 1 does not work, replace the system board (service provider only).

0284: TCG-compliant functionality-related error (might be the BIOS code validation failure) Replace the system board (service provider only).

0285: TCG-compliant functionality-related error (might be the TPM initialization failure) Replace the system board (service provider only).

0286: Integrated graphics error Replace the system board (service provider only).

38 ThinkPad X12 Detachable Gen 1 Hardware Maintenance Manual

Error codes Solutions

0287: Discrete graphics error 1. Reinstall or replace the discrete graphics card (service provider only).

2. If step 1 does not work, replace the system board (service provider only).

0288: Computer display error 1. Reconnect the display cable on both the system board side and the computer display side (service provider only) and check the LCD panel.

2. If step 1 does not work, connect an external display to your computer and check the status (customer or service provider).

If the external display works, replace the LCD panel (service provider only).

If the external display does not work, replace the system board (service provider only).

No-beep symptoms Table 4. No-beep symptoms

Symptom or error FRU or action, in sequence

No beep, system-status indicator on, LCD blank, and no POST.

1. Run LCD Self Test. 2. Ensure that every connector is connected tightly and

correctly. 3. Reseat memory module. 4. Replace the system board.

No beep, system-status indicator on, and LCD blank during POST.

1. Run LCD Self Test.

2. Reseat memory module.

3. Replace the system board.

The power-on password prompt appears. A power-on password or a supervisor password is set. Type the password and press Enter.

The hard-disk password prompt appears. A hard-disk password is set. Type the password and press Enter.

LCD-related symptoms Important: The TFT LCD for the notebook computer contains many thin-film transistors (TFTs). The presence of a small number of dots that are missing, discolored, or always lighted is characteristic of TFT LCD technology, but excessive pixel problems can cause viewing concerns.If the LCD you are servicing has two or less visible defective pixels, it should not be considered faulty. However, if the LCD has three or more visible defective pixels, it will be deemed as defective by Lenovo and it should be replaced.

Notes:

This policy applies to all ThinkPad notebooks purchased on 1 January, 2008 or later.

Lenovo will not provide warranty replacement if the LCD is within specifications because we cannot guarantee that any replacement LCD will have zero pixel defects.

One pixel consists of R, G, B sub-pixels.

LCD Self Test

Chapter 4. Related service information 39

When you turn on the computer and the LCD goes black, run LCD Self Test to help you determine whether the LCD functions normally.

To run LCD Self Test:

1. Ensure that the computer is connected to ac power. Then, press the power button for about seven seconds to turn off the computer.

2. Press Fn, left Ctrl, and the power button at the same time. If the computer displays five solid colors in sequence across the entire screen, it indicates that the LCD functions normally.

3. The test lasts for about 20 seconds and then exits automatically. You also can press the power button to exit the test.

Table 5. LCD-related symptoms

Symptom or error FRU or action, in sequence

No beep, power-on indicator on, and a blank LCD during POST.

1. Run LCD Self Test. 2. Replace the system board.

LCD backlight not working. LCD too dark. LCD brightness cannot be adjusted. LCD contrast cannot be adjusted.

1. Reseat the LCD connectors. 2. Replace the LCD assembly. 3. Replace the system board.

LCD screen unreadable. Characters missing pixels. Screen abnormal. Wrong color displayed.

1. See important note for LCD-related symptoms. 2. Reseat the LCD connectors. 3. Replace the LCD assembly. 4. Replace the system board.

Horizontal or vertical lines displayed on LCD. Replace the LCD assembly.

Intermittent problems Intermittent system hang problems can be due to a variety of causes that have nothing to do with a hardware defect, such as cosmic radiation, electrostatic discharge, or software errors. FRU replacement should be considered only when a problem recurs.

When analyzing an intermittent problem, do the following:

1. Run the diagnostic test for the system board in loop mode at least 10 times.

2. If no error is detected, do not replace any FRUs.

3. If any error is detected, replace the FRU shown by the FRU code. Rerun the test to verify that no more errors exist.

Undetermined problems If the diagnostic tests did not identify the adapter or device that has failed, if wrong devices are installed, or if the system simply is not operating, follow these procedures to isolate the failing FRU (do not isolate FRUs that have no defects).

Verify that all attached devices are supported by the computer.

Verify that the power supply being used at the time of the failure is operating correctly. See Power system checkout on page 28.

1. Turn off the computer. 2. Visually check each FRU for damage. Replace any damaged FRU. 3. Remove or disconnect all of the following devices:

a. Non-ThinkPad devices

40 ThinkPad X12 Detachable Gen 1 Hardware Maintenance Manual

b. Printer, mouse, and other external devices c. External diskette drive or optical drive d. Wireless cards

4. Turn on the computer. 5. Determine whether the problem has been solved. 6. If the problem does not recur, reconnect the removed devices one at a time until you find the failing FRU. 7. If the problem remains, replace the following FRUs one at a time (do not replace a nondefective FRU):

a. System board b. LCD assembly

Chapter 4. Related service information 41

42 ThinkPad X12 Detachable Gen 1 Hardware Maintenance Manual

Chapter 5. Special keys

The special keys on the keyboard help you work more easily and effectively.

+

Invoke the special function printed as an icon on each key or standard function of F1F12 function keys.

FnLock indicator on: standard function

FnLock indicator off: special function

Enable / disable speakers

Decrease volume

Increase volume

Enable / disable microphones

Darken display

Brighten display

Manage external displays

Enable / disable wireless

Open / collapse notification center

Answer incoming calls on Microsoft Teams

Decline incoming calls on Microsoft Teams

Customize the function of this key on Vantage app.

+ Open Snipping Tool

+ Toggle keyboard backlight

+ Break operation

+ Pause operation

Copyright Lenovo 2021, 2022 43

+ Scroll contents

+ Send system request

+

Enter sleep mode

To wake up the computer, press Fn or the power button.

+ Go to beginning

+ Go to end

44 ThinkPad X12 Detachable Gen 1 Hardware Maintenance Manual

Chapter 6. Locations

This chapter introduces the locations of the hardware components on your computer.

Locating computer controls, connectors, and indicators This topic introduces the locations of the computer controls, connectors, and indicators.

Overview

Infrared (IR) Camera* / Camera* Webcam privacy shutter (Camera cover)

Microphone NFC mark*

Speaker Volume up button

Volume down button Security-lock slot

Power connector (USB-C) Nano-SIM-card tray /eSIM-card tray*

Copyright Lenovo 2021, 2022 45

Thunderbolt 4 connector (USB-C) Audio connector

Touch screen

* for selected models

Power button Rear Camera

Emergency-reset hole

Locating FRUs and CRUs This topic introduces the following service parts: Major FRUs on page 48 Miscellaneous parts and other FRUs on page 50 Connector and cable guide on page 50

Notes: CRU statement for customers:

You can resolve some problems with your product with a replacement part you can install yourself, called a Customer Replaceable Unit or CRU. Some CRUs are designated as self-service CRUs and others are designated as optional-service CRUs. Installation of self-service CRUs is your responsibility. For optional-service CRUs, you can either install the CRU yourself or you can request that a Service Provider install the CRU according to the warranty service for your product. If you intend on installing the CRU, Lenovo will ship the CRU to you. CRU information and replacement instructions are shipped with your product and are available from Lenovo at any time upon request. You can find a list of CRUs for your product in this Hardware Maintenance Manual. An electronic version of this manual can be found at https://support.lenovo.com. Click Documentation and then follow the on-screen instructions to find the

46 ThinkPad X12 Detachable Gen 1 Hardware Maintenance Manual

manual for your product. You might be required to return the defective part that is replaced by the CRU. When return is required: (1) return instructions, a prepaid shipping label, and a container will be included with the replacement CRU; and (2) you might be charged for the replacement CRU if Lenovo does not receive the defective CRU within thirty (30) days of your receipt of the replacement CRU. See your Lenovo Limited Warranty documentation for full details.

ThinkPad computers contain the following types of CRUs and FRUs: Self-service CRUs: Refer to parts that can be installed or replaced easily by customer themselves or

by trained service technicians at an additional cost. Optional-service CRUs: Refer to parts that can be installed or replaced by customers with a greater

skill level. Trained service technicians can also provide service to install or replace the parts under the type of warranty designated for the customers machine.

FRUs: Refer to parts that must be installed or replaced only by trained service technicians. If customers choose to replace the FRUs by themselves, the product warranty might be affected.

Each FRU/CRU is available for all types or models, unless otherwise specified.

Chapter 6. Locations 47

Major FRUs

48 ThinkPad X12 Detachable Gen 1 Hardware Maintenance Manual

No. FRU descriptions Self-service CRU Optional-service CRU

1 LCD module No No

2 NFC module* No No

3 NFC module cable* No No

4 NFC antenna* No No

5 Wireless-LAN antenna assembly No No

6 Wireless-WAN antenna assembly* No No

7 Webcam privacy shutter No No

8 Front camera module No No

9 Front camera bracket No No

10 Rear camera No No

11 P-sensor cable* No No

12 Microphone assembly No No

13 Power board cable No No

14 Power board No No

15 M.2 solid-state drive No No

16 Thermal pad for M.2 solid-state drive No No

17 Volume board cable No No

18 Volume board No No

19 Hook holder for bezel No No

20 Security-lock bracket No No

21 Hinges No No

22 Power cord Yes No

23 ac power adapter Yes No

24 Miscellaneous parts (See Miscellaneous parts and other FRUs on page 50.)

No No

25 ThinkPad X12 Detachable Folio Keyboard* Yes No

26 Lenovo Digital Pen* Yes No

27 Lenovo Precision Pen* Yes No

28 Kickstand No No

29 Built-in battery No No

30 Removable tape No No

31 Pogo pin cable No No

32 Back cover assembly No No

33 USB-C board cable No No

34 USB-C board No No

35 USB-C board bracket No No

Chapter 6. Locations 49

No. FRU descriptions Self-service CRU Optional-service CRU

36 Speakers No No

37 System board No No

38 I/O bracket No No

39 Thermal fan assembly No No

40 Wireless-WAN card* No No

41 LCD cable No No

42 Nano-SIM-card tray Yes No

* for selected models

Miscellaneous parts and other FRUs FRU descriptions Self-service CRU Optional-service CRU

Screw kit: Screw M2 L2.5 mm, Black (23) Screw M2 L2 mm, Black (1) Screw M2 L2 mm, Silver(1) Screw M2 L3.5 mm, Black (6) Screw M1.6 L2.4 mm, Silver (4) Screw M2 L2.15 mm, Silver (1)

No No

Label kit No No

Connector and cable guide This section provides information for Lenovo authorized service technicians to help identify connectors and cables for replacement purpose. To view each FRU and the exploded illustration of the computer, see Major FRUs on page 48.

Note: Depending on your model, some connectors or cables might not be available.

System board connectors and cables

Item Connector (location) Internal cable required Cable connection

1 Microphone assembly connector (internal)

The microphone assembly comes with the cable.

The microphone assembly comes with the cable. Connect the cable to this connector.

2 Front camera module connector (internal)

The front camera module comes with the cable.

The front camera module comes with the cable. Connect the cable to this connector.

50 ThinkPad X12 Detachable Gen 1 Hardware Maintenance Manual

Item Connector (location) Internal cable required Cable connection

3 Rear camera connector (internal)

The rear camera comes with the cable.

The rear camera comes with the cable. Connect the cable to this connector.

4 P-sensor connector (internal)

P-sensor cable The wireless-WAN antenna assembly comes with cables. Connect the P-sensor cable to this connector.

5 NFC module connector (internal)

NFC module cable The NFC module comes with the cable. Connect the cable to this connector.

6 Power board connector Power board cable The power board comes with the cable.

Connect the cable to this connector.

7 Speaker connector (near the M.2 solid-state drive slot) (internal)

The speaker comes with the cable.

The speaker comes with the cable. Connect the cable to this connector.

8 Thermal fan assembly connector (internal)

The thermal fan assembly comes with the cable.

The thermal fan assembly comes with cable. Connect the cable to this connector.

9 M.2 solid-state drive slot (internal)

No Insert an M.2 solid-state drive into this slot.

10 Built-in battery connector (internal)

The built-in battery comes with the cable.

The built-in battery comes with the cable. Connect the cable to this connector.

11 Pogo pin connector (internal)

Pogo pin cable The pogo pin comes with the cable. Connect the cable to this connector.

12 Volume board connector (internal)

Volume board cable The volume board comes with the cable. Connect the cable to this connector.

13 LCD module connector (internal)

LCD cable The LCD module comes with the cable. Connect the cable to this connector.

14 USB-C board connector (internal)

USB-C board cable The USB-C board comes with the cable. Connect the cable to this connector.

15 Speaker connector (near the Wireless-WAN card slot) (internal)

The speaker comes with the cable.

The speaker comes with the cable. Connect the cable to this connector.

16 Wireless-WAN card slot (internal)

No Insert a Wireless-WAN card into this slot.

17 Thunderbolt 4 connector (USB-C) (external)

No Connect USB-C compatible devices to this connector.

18 Audio connector (external) No Connect headphones or a headset to this

connector.

Looking up FRU information For detailed FRU information, including part numbers, descriptions, and substitution part numbers, go to: https://support.lenovo.com/partslookup

Chapter 6. Locations 51

52 ThinkPad X12 Detachable Gen 1 Hardware Maintenance Manual

Chapter 7. FRU replacement notices

This chapter presents notices related to removing and replacing parts. Read this chapter carefully before replacing any FRU.

CRU statement for customers: You can resolve some problems with your product with a replacement part you can install yourself, called a Customer Replaceable Unit or CRU. Some CRUs are designated as self-service CRUs and others are designated as optional-service CRUs. Installation of self-service CRUs is your responsibility. For optional- service CRUs, you can either install the CRU yourself or you can request that a Service Provider install the CRU according to the warranty service for your product. If you intend on installing the CRU, Lenovo will ship the CRU to you. CRU information and replacement instructions are shipped with your product and are available from Lenovo at any time upon request. You can find a list of CRUs for your product in this Hardware Maintenance Manual. An electronic version of this manual can be found at https://support.lenovo.com. Click Guides & Manuals and then follow the on-screen instructions to find the manual for your product. You might be required to return the defective part that is replaced by the CRU. When return is required: (1) return instructions, a prepaid shipping label, and a container will be included with the replacement CRU; and (2) you might be charged for the replacement CRU if Lenovo does not receive the defective CRU within thirty (30) days of your receipt of the replacement CRU. See your Lenovo Limited Warranty documentation for full details.

Service tool kit Ensure that the following service tool kit is prepared before you service a ThinkPad notebook computer.

No. Tool name Tool type

1 Phillips-head screwdriver Common tool

2 Torx-head screwdriver Common tool

3 Conductive tweezers Common tool

4 Hexagonal socket Common tool

5 Silicone grease Consumable tool

6 Polyamide tape Consumable tool

7 Mylar tape Consumable tool

8 Eraser Consumable tool

9 Electrical tape Consumable tool

10 Double-sided tape Consumable tool

11 Conductive tape Consumable tool

Note: The silicone grease can be applied to the surfaces of the microprocessor and heatsink to eliminate air gaps. The hexagonal socket is used to pick up the antenna connectors.

Screw notices Loose screws can cause a reliability problem. In the ThinkPad notebook computer, this problem is addressed with special nylon-coated screws that have the following characteristics:

Copyright Lenovo 2021, 2022 53

They maintain tight connections.

They do not easily come loose, even with shock or vibration.

They are harder to tighten.

Do the following when you service this machine:

Keep the screw kit in your tool bag. For the part number of the screw kit, go to: https://support.lenovo.com/partslookup

It is recommended to use new screws.

It is recommended to use each screw only once.

Tighten screws as follows:

Plastic to plastic Turn an additional 90 degrees after the screw head touches the surface of the plastic part.

Logic card to plastic Turn an additional 180 degrees after the screw head touches the surface of the logic card.

Notes:

Ensure that you use the correct screw. It is recommended to use new screws for replacements. If you have a torque screwdriver, tighten all screws firmly to the torque specified in the screw information table for each step.

Ensure that torque screwdrivers are calibrated correctly following country specifications.

Retaining serial numbers This section includes the following descriptions: Restoring the serial number of the system unit on page 54 Retaining the UUID on page 55 Reading or writing the ECA information on page 56

Restoring the serial number of the system unit When the computer was manufactured, the EEPROM on the system board was loaded with the serial numbers of the system and all major components. These numbers need to remain the same throughout the life of the computer.

If you replace the system board, you must restore the serial number of the system unit to its original value.

54 ThinkPad X12 Detachable Gen 1 Hardware Maintenance Manual

The serial number of the system unit is written on the label attached to the bottom of the computer.

If you cannot find the serial number of the system unit on the bottom of the computer, try the following method to get the number:

Note: Before you perform the operation, ensure that the UEFI/Legacy setting within the Startup menu in the ThinkPad Setup program is set to UEFI Only.

1. Connect a USB memory key to the computer. 2. Go to https://www.lenovo.com/maintenanceutilities and follow the instructions on the screen to create a

Maintenance Key.

Note: Only an authorized Lenovo service technician can access the above Web site. 3. Restart the computer. 4. When the logo is displayed, press Esc. The ThinkPad Config Information Update Utility interface is

displayed. 5. Type 1 under Enter the action desired, then press Enter. The ThinkPad Serial Number Update Utility for

Asset ID screen is displayed. 6. Type 2 under Enter the action desired, then press Enter. The serial number of each device in your

computer is displayed; the serial number of the system unit is listed as follows: 20- Serial number

7. Record the serial number of the system unit.

After you replace the system board, do the following to restore the serial number of the system unit: 1. Connect the Maintenance Key to the computer.

2. When the logo is displayed, press Esc. The ThinkPad Config Information Update Utility interface is displayed.

3. Type 1 under Enter the action desired, then press Enter. The ThinkPad Serial Number Update Utility for Asset ID screen is displayed.

4. Type 1 under Enter the action desired, then press Enter. Then follow the instructions on the screen to restore the serial number of the system unit.

Retaining the UUID The Universally Unique Identifier (UUID) is a 128-bit number uniquely assigned to your computer at production and stored in the EEPROM of your system board.

The algorithm that generates the number is designed to provide unique IDs until the year A.D. 3400. No two computers in the world have the same number.

When you replace the system board, perform the following steps to create a new UUID for the system board if the system board does not have a UUID:

Note: Before you perform the operation, ensure that the UEFI/Legacy setting within the Startup menu in the ThinkPad Setup program is set to UEFI Only.

1. Connect a USB memory key to the computer.

2. Go to https://www.lenovo.com/maintenanceutilities and follow the instructions on the screen to create a Maintenance Key.

Note: Only an authorized Lenovo service technician can access the above Web site. 3. Restart the computer.

4. When the logo screen is displayed, press Esc. The ThinkPad Config Information Update Utility interface is displayed.

Chapter 7. FRU replacement notices 55

5. Type 2 under Enter the action desired, then press Enter. The Auto UUID generation utility interface is displayed.

6. Type y under Change UUID. OK? [Y/N], then press Enter. A new UUID is created and written. If a valid UUID already exists, it is not overwritten.

Reading or writing the ECA information Information on Engineering Change Announcements (ECA) is stored in the EEPROM of the system board. The electronic storage of this information simplifies the procedure to check if the ECA has been previously applied to a machine. The machine does not need to be disassembled to check for the ECA application.

To check what ECAs have been previously applied to the machine, use the ECA Information Read/Write function on the USB Maintenance Key.

1. Insert the Maintenance Key and restart the computer. 2. From the main menu, select 6. Set ECA Information. 3. To read the ECA information, select 2. Read ECA/rework number from EEPROM and follow the

instructions on the screen. 4. To read the box build date, select 5. Read box build date from EEPROM, and follow the instruction on

the screen.

After an ECA has been applied to the machine, the EEPROM must be updated to reflect the ECA's application. Use the Maintenance Key to update the EEPROM.

Note: Only the ECA number is stored in the EEPROM. The machine type of the ECA is assumed to be the same as the machine type of the machine that had the ECA applied to it.

1. Insert the Maintenance Key and restart the computer.

2. From the main menu, select 6. Set ECA Information. 3. To write the ECA information, select 1. Write ECA/rework number from EEPROM, and follow the

instructions on the screen.

4. To write the box build date, select 4. Write box build date from EEPROM, and follow the instruction on the screen.

If the system board is being replaced, try to read the ECA information from the old system board and transfer the information to the new system. If the system board is inoperable, this will not be possible.

56 ThinkPad X12 Detachable Gen 1 Hardware Maintenance Manual

Chapter 8. Removing or replacing a FRU

This chapter provides instructions on how to remove or replace a FRU.

CRU statement for customers:

You can resolve some problems with your product with a replacement part you can install yourself, called a Customer Replaceable Unit or CRU. Some CRUs are designated as self-service CRUs and others are designated as optional-service CRUs. Installation of self-service CRUs is your responsibility. For optional- service CRUs, you can either install the CRU yourself or you can request that a Service Provider install the CRU according to the warranty service for your product. If you intend on installing the CRU, Lenovo will ship the CRU to you. CRU information and replacement instructions are shipped with your product and are available from Lenovo at any time upon request. You can find a list of CRUs for your product in this Hardware Maintenance Manual. An electronic version of this manual is available for downloading at https:// support.lenovo.com. You might be required to return the defective CRU. When return is required: (1) return instructions, a prepaid shipping label, and a container will be included with the replacement CRU; and (2) you might be charged for the replacement CRU if Lenovo does not receive the defective part within thirty (30) days of your receipt of the replacement CRU. See your Lenovo Limited Warranty documentation for full details.

General guidelines When removing or replacing a FRU, be sure to observe the following general guidelines:

1. Do not try to service any computer unless you have been trained and certified. An untrained person runs the risk of damaging parts.

2. Before replacing any FRU, review Chapter 7 FRU replacement notices on page 53. 3. Begin by removing any FRUs that have to be removed before replacing the failing FRU. Any such FRUs

are listed at the beginning of each FRU replacement section. Remove them in the order in which they are listed.

4. Follow the correct sequence in the steps for removing a FRU, as given in the drawings by the numbers in square callouts.

5. When turning a screw, turn it in the direction as given by the arrow in the drawing. 6. When removing a FRU, move it in the direction as given by the arrow in the drawing. 7. To put the new FRU in place, reverse the removal procedure and follow any notes that pertain to

replacement. 8. When replacing a FRU, use the correct screws as shown in the replacement procedures.

DANGER

Before removing any FRU, turn off the computer, unplug all power cords from electrical outlets, disconnect any interconnecting cables, and then disable the built-in battery.

Attention: After replacing a FRU, do not turn on the computer until you have made sure that all screws, springs, and other small parts are in place and none are loose inside the computer. Verify this by shaking the computer gently and listening for rattling sounds. Metallic parts or metal flakes can cause electrical short circuits.

Attention: The system board is sensitive to, and can be damaged by, electrostatic discharge (ESD). Before touching it, establish personal grounding by touching a ground point with one hand or by using an ESD strap.

Copyright Lenovo 2021, 2022 57

Before servicing the computer Carefully read this topic before servicing the computer.

Removing external devices Before you start servicing, ensure that you remove all external devices installed by the customer, such as MicroSD card, dock, and external display.

Disabling the built-in battery Before replacing any FRU/CRU, ensure that you disable the built-in battery.

To disable Fast Startup, do the following:

1. Go to Control Panel, and then change the view of Control Panel from Category to Large icons or Small icons.

2. Click Power Options, and then click Choose what the power buttons do on the left pane.

3. Click Change settings that are currently unavailable at the top.

4. If prompted by User Account Control (UAC), click Yes.

5. Clear the Turn on fast startup check box, and then click Save changes.

To disable the built-in battery, do the following:

1. Turn off the computer and disconnect the computer from ac power and all connected cables.

2. Restart the computer. When the logo screen is displayed, immediately press F1 to enter ThinkPad Setup.

3. Select Config Power. The Power submenu is displayed.

4. Select Disable built-in battery and press Enter.

5. Select Yes in the Setup Confirmation window. The built-in battery is disabled and the computer turns off automatically. Wait three to five minutes to let the computer cool.

Removing the nano-SIM card and the nano-SIM-card tray (for selected models) If the computer you are servicing has a nano-SIM card installed, remove the nano-SIM card and the nano- SIM-card tray before you start the servicing.

After you finish the servicing, ensure that you install the card and the tray back into the slot firmly.

58 ThinkPad X12 Detachable Gen 1 Hardware Maintenance Manual

Removing a major FRU This section provides instructions on how to remove a major FRU.

1010 LCD module

Removal steps

Chapter 8. Removing or replacing a FRU 59

Remember to remove the mylar or the tape before you start the following steps.

Step Screw (quantity) Color Torque

2 M2 L3.5 mm, flat-head, nylon-coated (6) Black 0.181 Nm (1.85 kgf-cm)

Label locations on the back cover assembly

The following illustration shows the location of each label.

60 ThinkPad X12 Detachable Gen 1 Hardware Maintenance Manual

1 Asset tag_40Y917Y 2 Country label

3 IMEI label 4 Asset tag

5 Energy Star label 6 Intel label

7 Windows label 8 Serial number label

9 Korea/EU GEO label 10 India/TW label

11 China (CECP) GEO label 12 China GEO label

13 China CECP label

1020 Built-in battery Important notices for replacing a battery

Attention: Lenovo has no responsibility for the performance or safety of unauthorized batteries, and provides no warranties for failures or damage arising out of their use.

The Lenovo Solution Center program provides an automatic battery diagnostic test that determines if the battery is defective. A battery FRU should not be replaced unless this diagnostic test shows that the battery is defective. The only exception to this is if the battery is physically damaged or a customer is reporting a possible safety issue.

Chapter 8. Removing or replacing a FRU 61

If the Lenovo Solution Center program is not installed on the computer, the customer should download and install the program to diagnose the battery, before getting a non-physically damaged battery replaced. Note that the replacement of a physically damaged battery is not covered by the warranty.

For access, remove this FRU: 1010 LCD module on page 59

Removal steps

DANGER

Use only the authorized battery specified for your computer. Any other battery could ignite or explode.

Note: The tapes for securing the built-in battery are not reusable. Whenever the built-in battery is removed, you should order new tapes.

Note: After the built-in battery is removed or re-installed, Date/Time, power-on password and system management passwords are initialized. Press F1 to enter the ThinkPad Setup program to change Date/Time.

62 ThinkPad X12 Detachable Gen 1 Hardware Maintenance Manual

1030 Kickstand and hinges For access, remove this FRU: 1010 LCD module on page 59

Removal steps

Chapter 8. Removing or replacing a FRU 63

Step Screw (quantity) Color Torque

2 M2 L2.5 mm, flat-head, nylon-coated (6) Black 0.181 Nm (1.85 kgf-cm)

5 M2 L2.5 mm, flat-head, nylon-coated (6) Black 0.181 Nm (1.85 kgf-cm)

1040 LCD cable For access, remove these FRUs: 1010 LCD module on page 59 1020 Built-in battery on page 61

Removal steps

1050 Pogo pin cable For access, remove these FRUs: 1010 LCD module on page 59 1020 Built-in battery on page 61

64 ThinkPad X12 Detachable Gen 1 Hardware Maintenance Manual

Removal steps

Step Screw (quantity) Color Torque

2 M1.6 L2.4 mm, flat-head, nylon-coated (4) Silver 0.098 Nm (1.05 kgf-cm)

1060 Volume board and cable For access, do the following :

1. Remove these FRUs: 1010 LCD module on page 59 1020 Built-in battery on page 61

2. Disconnect the pogo pin cable from the system board. See 1050 Pogo pin cable on page 64.

Chapter 8. Removing or replacing a FRU 65

Removal steps

Step Screw (quantity) Color Torque

3 M2 L2.5 mm, flat-head, nylon-coated (2) Black 0.181 Nm (1.85 kgf-cm)

1070 Hook holder for bezel For access, do the following :

1. Remove these FRUs: 1010 LCD module on page 59 1020 Built-in battery on page 61

2. Disconnect the pogo pin cable from the system board. See 1050 Pogo pin cable on page 64. 3. Remove the volume board and cable. See 1060 Volume board and cable on page 65.

66 ThinkPad X12 Detachable Gen 1 Hardware Maintenance Manual

Removal steps

1080 Security-lock bracket For access, remove this FRU: 1010 LCD module on page 59

Removal steps

Step Screw (quantity) Color Torque

1 M2 L2.5 mm, flat-head, nylon-coated (2) Black 0.181 Nm (1.85 kgf-cm)

1090 USB-C board bracket For access, remove this FRU: 1010 LCD module on page 59

Chapter 8. Removing or replacing a FRU 67

Removal steps

Step Screw (quantity) Color Torque

1 M2 L2.5 mm, flat-head, nylon-coated (2) Black 0.181 Nm (1.85 kgf-cm)

1100 USB-C board and cable For access, remove these FRUs: 1010 LCD module on page 59 1020 Built-in battery on page 61 1090 USB-C board bracket on page 67

Removal steps

68 ThinkPad X12 Detachable Gen 1 Hardware Maintenance Manual

Step Screw (quantity) Color Torque

2 M2 L2.5 mm, flat-head, nylon-coated (1) Black 0.181 Nm (1.85 kgf-cm)

1110 Thermal fan assembly For access, remove this FRU: 1010 LCD module on page 59

Removal steps

3a

3d 3d

3b

3d 3c

3d

3d 3d

When installing:

Ensure that the connector is attached firmly.

Chapter 8. Removing or replacing a FRU 69

Do not press the top of the fan cover and the fan hub.

Before you attach the fan assembly to the computer, apply thermal grease, at an amount of 0.2 grams, on the part marked a as shown in the following illustrations. Too much or too little application of grease can cause a thermal problem due to imperfect contact with a component.

1120 P-sensor cable For access, remove this FRU: 1010 LCD module on page 59

Removal steps

1130 M.2 solid-state drive For access, remove these FRUs: 1010 LCD module on page 59 1110 Thermal fan assembly on page 69

Attention:

Do not drop the drive or apply any physical shock to it. The drive is sensitive to physical shock. Improper handling can cause damage and permanent loss of data.

Before removing the drive, have the user make a backup copy of all the information on it if possible.

Never remove the drive while the system is operating or in sleep mode.

Removal steps

A Mylar film might cover the M.2 solid-state drive. To access the M.2 SSD, peel off the film first.

70 ThinkPad X12 Detachable Gen 1 Hardware Maintenance Manual

Step Screw (quantity) Color Torque

1 M2 L2.15 mm, flat-head, nylon-coated (1) Silver 0.181 Nm (1.85 kgf-cm)

1140 Speakers For access, remove these FRUs: 1010 LCD module on page 59 1110 Thermal fan assembly on page 69

Removal steps

1150 Wireless-WAN card (for selected models) For access, remove this FRU: 1010 LCD module on page 59

Chapter 8. Removing or replacing a FRU 71

Removal steps

Step Screw (quantity) Color Torque

2 M2 L2 mm, flat-head, nylon-coated (1) Silver 0.181 Nm (1.85 kgf-cm)

When installing: ensure that you connect the red cable to the main connector, and the blue cable to the auxiliary connector.

1160 Power board and cable For access, remove these FRUs: 1010 LCD module on page 59 1110 Thermal fan assembly on page 69

Removal steps

72 ThinkPad X12 Detachable Gen 1 Hardware Maintenance Manual

Step Screw (quantity) Color Torque

2 M2 L2.5 mm, flat-head, nylon-coated (1) Black 0.181 Nm (1.85 kgf-cm)

1170 I/O bracket For access, remove this FRU: 1010 LCD module on page 59

Removal steps

Step Screw (quantity) Color Torque

1 M2 L2.5 mm, flat-head, nylon-coated (3) Black 0.181 Nm (1.85 kgf-cm)

1180 NFC module, NFC module cable, and NFC antenna (for selected models) For access, remove this FRU: 1010 LCD module on page 59

Chapter 8. Removing or replacing a FRU 73

Removal steps

1190 Webcam privacy shutter For access, remove this FRU: 1010 LCD module on page 59

74 ThinkPad X12 Detachable Gen 1 Hardware Maintenance Manual

Removal steps

1200 Front camera module For access, remove these FRUs: 1010 LCD module on page 59 1190 Webcam privacy shutter on page 74

Removal steps

1210 Rear camera For access, remove these FRUs: 1010 LCD module on page 59 1110 Thermal fan assembly on page 69 1190 Webcam privacy shutter on page 74

Chapter 8. Removing or replacing a FRU 75

Removal steps

1220 Microphone assembly For access, remove these FRUs: 1010 LCD module on page 59 1110 Thermal fan assembly on page 69 1190 Webcam privacy shutter on page 74 1200 Front camera module on page 75 1210 Rear camera on page 75

Removal steps

1230 Front camera bracket For access, remove these FRUs: 1010 LCD module on page 59 1110 Thermal fan assembly on page 69 1190 Webcam privacy shutter on page 74 1200 Front camera module on page 75 1210 Rear camera on page 75 1220 Microphone assembly on page 76

76 ThinkPad X12 Detachable Gen 1 Hardware Maintenance Manual

Removal step

1240 System board Important notices for handling the system board

When handling the system board, read the following:

The system board has an accelerometer, which can be broken when several thousands of G-forces are applied.

Be careful not to drop the system board on a bench top that has a hard surface, such as metal, wood, or composite.

Avoid rough handling of any kind.

At every point in the process, be sure not to drop or stack the system board.

If you put a system board down, be sure to put it only on a padded surface such as an ESD mat or a corrugated conductive material.

Attention: The microprocessor a soldered on the system board is extremely sensitive. When you service the system board, avoid any kind of rough handling.

For access, remove these FRUs: 1010 LCD module on page 59 1110 Thermal fan assembly on page 69 1150 Wireless-WAN card (for selected models) on page 71 1130 M.2 solid-state drive on page 70 1180 NFC module, NFC module cable, and NFC antenna (for selected models) on page 73 1170 I/O bracket on page 73

Chapter 8. Removing or replacing a FRU 77

Removal steps

Step Screw (quantity) Color Torque

12 M2 L2 mm, big-head, nylon-coated (1) Black 0.181 Nm (1.85 kgf-cm)

1250 Wireless-LAN antenna assembly For access, remove these FRUs: 1010 LCD module on page 59 1110 Thermal fan assembly on page 69 1150 Wireless-WAN card (for selected models) on page 71 1130 M.2 solid-state drive on page 70 1180 NFC module, NFC module cable, and NFC antenna (for selected models) on page 73 1170 I/O bracket on page 73 1240 System board on page 77

78 ThinkPad X12 Detachable Gen 1 Hardware Maintenance Manual

Removal steps

Attention: When you route the cables, ensure that they are not subject to any tension. Tension could cause the cables to be damaged by the cable guides, or a wire to be broken.

Chapter 8. Removing or replacing a FRU 79

Antenna locations

a Wireless-LAN antenna (main) b Wireless-LAN antenna (auxiliary)

When installing: plug the gray cable into the main connector and the white cable into the auxiliary connector.

1260 Wireless-WAN antenna assembly (for selected models)

Removal steps

For access, remove these FRUs: 1010 LCD module on page 59 1110 Thermal fan assembly on page 69 1150 Wireless-WAN card (for selected models) on page 71 1130 M.2 solid-state drive on page 70 1180 NFC module, NFC module cable, and NFC antenna (for selected models) on page 73 1120 P-sensor cable on page 70 1170 I/O bracket on page 73 1240 System board on page 77

80 ThinkPad X12 Detachable Gen 1 Hardware Maintenance Manual

Attention: When you route the cables, ensure that they are not subject to any tension. Tension could cause the cables to be damaged by the cable guides, or a wire to be broken.

When installing: ensure that you connect the red cable to the main connector, and the blue cable to the auxiliary connector.

Antenna locations

a Wireless WAN antenna (auxiliary)* b Wireless WAN antenna (main)*

Chapter 8. Removing or replacing a FRU 81

* for selected models

82 ThinkPad X12 Detachable Gen 1 Hardware Maintenance Manual

Appendix A. Notices

Lenovo may not offer the products, services, or features discussed in this document in all countries. Consult your local Lenovo representative for information on the products and services currently available in your area. Any reference to a Lenovo product, program, or service is not intended to state or imply that only that Lenovo product, program, or service may be used. Any functionally equivalent product, program, or service that does not infringe any Lenovo intellectual property right may be used instead. However, it is the users responsibility to evaluate and verify the operation of any other product, program, or service.

Lenovo may have patents or pending patent applications covering subject matter described in this document. The furnishing of this document does not give you any license to these patents. You can send license inquiries, in writing, to:

Lenovo (United States), Inc. 8001 Development Drive Morrisville, NC 27560 U.S.A. Attention: Lenovo Director of Licensing

LENOVO PROVIDES THIS PUBLICATION AS IS WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Some jurisdictions do not allow disclaimer of express or implied warranties in certain transactions, therefore, this statement may not apply to you.

This information could include technical inaccuracies or typographical errors. Changes are periodically made to the information herein; these changes will be incorporated in new editions of the publication. Lenovo may make improvements and/or changes in the product(s) and/or the program(s) described in this publication at any time without notice.

The products described in this document are not intended for use in implantation or other life support applications where malfunction may result in injury or death to persons. The information contained in this document does not affect or change Lenovo product specifications or warranties. Nothing in this document shall operate as an express or implied license or indemnity under the intellectual property rights of Lenovo or third parties. All information contained in this document was obtained in specific environments and is presented as an illustration. The result obtained in other operating environments may vary.

Lenovo may use or distribute any of the information you supply in any way it believes appropriate without incurring any obligation to you.

Any references in this publication to non-Lenovo Web sites are provided for convenience only and do not in any manner serve as an endorsement of those Web sites. The materials at those Web sites are not part of the materials for this Lenovo product, and use of those Web sites is at your own risk.

Any performance data contained herein was determined in a controlled environment. Therefore, the result obtained in other operating environments may vary significantly. Some measurements may have been made on development-level systems and there is no guarantee that these measurements will be the same on generally available systems. Furthermore, some measurements may have been estimated through extrapolation. Actual results may vary. Users of this document should verify the applicable data for their specific environment.

Copyright Lenovo 2021, 2022 83

Trademarks LENOVO, LENOVO logo, THINKPAD, THINKPAD logo and TRACKPOINT are trademarks of Lenovo. Microsoft and Windows are trademarks of the Microsoft group of companies. USB-C is a registered trademark of USB Implementers Forum. All other trademarks are the property of their respective owners.

84 ThinkPad X12 Detachable Gen 1 Hardware Maintenance Manual

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