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Lenovo ThinkBook 14-IML Laptop Hardware Maintenance Manual PDF

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Summary of Content for Lenovo ThinkBook 14-IML Laptop Hardware Maintenance Manual PDF

Lenovo Thinkbook series Hardware Maintenance Manual

First Edition (September 2019)

Copyright Lenovo 2019.

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. General checkout . . . . . 21 What to do first . . . . . . . . . . . . . . . 21 CRU list . . . . . . . . . . . . . . . . . . 22

Chapter 3. Idetifying FRU (CRU) . . . 23 Locate FRU and CRU . . . . . . . . . . . . 23

Chapter 4. Removing a FRU or CRU . . . . . . . . . . . . . . . . . . 27 Service tools . . . . . . . . . . . . . . . . 27 General guidelines. . . . . . . . . . . . . . 27 Remove the lower case . . . . . . . . . . . . 28 Remove the battery pack . . . . . . . . . . . 30

Remove the coin-cell battery. . . . . . . . . . 31 Remove the speakers . . . . . . . . . . . . 32 Remove the M.2 solid-state drive . . . . . . . . 33 Remove the M.2 solid-state drive thermal pad . . . 35 Remove the thermal choke pad. . . . . . . . . 36 Remove the WLAN card . . . . . . . . . . . 36 Remove the fan . . . . . . . . . . . . . . . 38 Remove the heat sink . . . . . . . . . . . . 40 Remove the HDD . . . . . . . . . . . . . . 42 Remove the memory module . . . . . . . . . 44 Remove the DC-in cable . . . . . . . . . . . 45 Remove the I/O board brackets . . . . . . . . 47 Remove the I/O board . . . . . . . . . . . . 49 Remove the power button board . . . . . . . . 51 Remove the power button . . . . . . . . . . . 53 Remove the system board. . . . . . . . . . . 55 Remove the touch pad . . . . . . . . . . . . 57 Remove the upper case . . . . . . . . . . . 59 Remove the LCD bezel . . . . . . . . . . . . 61 Remove the LCD panel . . . . . . . . . . . . 63 Remove the camera module . . . . . . . . . . 65 Trademarks . . . . . . . . . . . . . . . . lxix

Copyright Lenovo 2019 i

ii Lenovo Thinkbook series Hardware Maintenance Manual

About this manual

This manual contains service and reference information for the following Lenovo products.

Machine Machine type (MT)

Lenovo ThinkBook 14-IML 20RV

Lenovo ThinkBook 15-IML 20RW

Lenovo ThinkBook 14-IIL 20SL

Lenovo ThinkBook 15-IIL 20SM

Important:

This manual is intended only for trained service technicians who are familiar with Lenovo products.

Before servicing a Lenovo product, be sure to read all the information under Chapter 1 Safety information on page 1.

Copyright Lenovo 2019 iii

iv Lenovo Thinkbook series Hardware Maintenance Manual

Chapter 1. Safety information

This chapter presents the following safety information that you need to be familiar with before you service a Lenovo notebook computer.

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 tool case 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 non-conductive 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. 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

Copyright Lenovo 2019 1

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 need 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,

non-grounded 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-Lenovo 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.

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 cathode ray tube (CRT) face or a bulging capacitor Mechanical hazards, such as loose or missing hardware

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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: http:// www.lenovo.com/serviceparts-lookup

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-Lenovo alterations. Use good judgment as to the safety of any non-Lenovo

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. 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.

Chapter 1. Safety information 3

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

PERIGO

Chapter 1. Safety information 7

PERIGO

PERIGO

PERIGO

PERIGO

PERIGO

8 Lenovo Thinkbook series Hardware Maintenance Manual

DANGER

DANGER

DANGER

DANGER

Chapter 1. Safety information 9

DANGER

DANGER

DANGER

DANGER

VORSICHT

10 Lenovo Thinkbook series Hardware Maintenance Manual

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. General checkout

This chapter contains the following topics:

Before you go to the checkout instructions, ensure that you 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 FRU.

Be extremely careful during such write operations as copying, saving, or formatting. Drives in the computer that you are servicing sequence 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, make sure that the model of the machine and the FRU part number are correct by referring to the FRU parts list.

A FRU should not be replaced because of a single, unreproducible failure. Single failures can occur for a variety of 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:

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

Copyright Lenovo 2019 21

Damage caused by the improper insertion of a personal-computer card (PC card) or the installation of an incompatible card

Improper disc insertion or use of an external optical drive Fuses blown by attachment of a non-supported 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 non-warranted 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.

CRU list Table 1. Model: Lenovo ThinkBook 14-IML (Machine type: 20RV)

CRU Type

ac power adapter self-service

Table 2. Model: Lenovo ThinkBook 15-IML (Machine type: 20RW)

CRU Type

ac power adapter self-service

Table 3. Model: Lenovo ThinkBook 14-IIL (Machine type: 20SL)

CRU Type

ac power adapter self-service

Table 4. Model: Lenovo ThinkBook 15-IIL (Machine type: 20SM)

CRU Type

ac power adapter self-service

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Chapter 3. Idetifying FRU (CRU)

Locate FRU and CRU The exploded illustrations help Lenovo service technicians identify FRU or CRU that they may need to replace when servicing a customers computer.

Figure 1. Lenovo ThinkBook 14-IML/Lenovo ThinkBook 15-IML/Lenovo ThinkBook 14-IIL/Lenovo ThinkBook 15-IIL system exploded view

Copyright Lenovo 2019 23

Table 5. FRU (CRU) categories

No. FRU (CRU) category

1 Upper case (with keyboard)

2 DC-in cable

3 Power button

4 Power button cable

5 Power button board

6 I/O board with cable

7 Choke thermal pad

8 I/O bracket

9 Fan

10 HDD AL foil

11 HDD

12 HDD bracket

13 Coin-cell battery

14 Battery pack

15 Speakers

16 Rear rubber foot

17 Rear rubber foot

18 Lower case

19 SSD

20 SSD thermal pad

21 SSD AL foil

22 Memory module

23 HDD cable

24 Heat sink

25 I/O bracket

26 WLAN card

27 System board

28 Touchpad bracket

29 Touchpad

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Figure 2. Lenovo ThinkBook 14-IML, Lenovo ThinkBook 15-IML, Lenovo ThinkBook 14-IIL, and Lenovo ThinkBook 15-IIL LCD exploded view

Table 6. FRU (CRU) categories

No. FRU (CRU) category

1 Hinge cap

2 LCD bezel

3 Hinges

4 Camera module

5 LCD module

6 Removable tapes

7 LCD cover

Chapter 3. Idetifying FRU (CRU) 25

26 Lenovo Thinkbook series Hardware Maintenance Manual

Chapter 4. Removing a FRU or CRU

Service tools The following table lists tools for servicing Lenovo computers. Tools with a cross mark are needed for serving the product models as described by this publication. Prepare them before you service the product.

Table 7. Service tools

Service tool and consumable Model applicability

Screw driver (Phillips head) (PH1/PH01) X

Screw driver (Torx head) (T5)

Screw driver (Torx head) (T30)

Pry tool 1 X

Tweezers (conductive) X

Tweezers (isolated)

Suction cup

Hexagonal socket

Silicone grease

Acetate tape X

Polyamide tape

Mylar tape

Electrical tape

Double-sided tape

Conductive tape

Eraser

Heat gun

Brown brush

Notes:

T30 screw drivers are used to service the new Intel Xeon CPUs.

Hexagonal sockets are used to remove antenna connectors.

Silicone grease is applied to the CPU and heat sink surfaces to eliminate air gaps.

General guidelines When removing or replacing a FRU, ensure that you 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. Begin by removing any FRU that has to be removed before replacing the failing FRU. Any such FRU is listed at the beginning of each FRU replacement procedure. Remove them in the order in which they are listed.

Copyright Lenovo 2019 27

3. Follow the correct sequence in the steps for removing a FRU, as shown in the illustrations by the numbers in square callouts.

4. When removing a FRU, move it in the direction as shown by the arrow in the illustration.

5. To install a new FRU in place, perform the removal procedure in reverse and follow any notes that pertain to replacement.

6. When replacing a FRU, carefully retain and reuse all screws.

7. When replacing the base cover, reapply all labels that come with the replacement base cover. If some original labels are not included with the replacement base cover, peel them off from the original base cover and paste them on the replacement base cover.

DANGER

Before removing any FRU or CRU, shut down the computer and unplug all power cords from electrical outlets.

Attention: After replacing a FRU, do not turn on the computer until you have ensured 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 ESD. Before touching it, establish personal grounding by touching a ground point with one hand or by using an ESD strap (P/N 6405959).

Remove the lower case Make sure the computer has been shut down before servicing the computer.

Step 1. Disconnect all power cords, cables, and USB devices from the computer.

Step 2. Place the computer upside down on a flat surface.

Step 3. Remove ten screws.

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Figure 3. Remove ten screws

Screw specifications Number of screws

M2 x 5.0 mm 10

Step 4. Pry up the latches and remove the lower case.

Figure 4. Pry up the latches and remove the lower case

Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following replacement part:

Lower case

Chapter 4. Removing a FRU or CRU 29

Remove the battery pack Make sure the following FRU (or CRU) has been removed.

Remove the lower case on page 28

Step 1. Disconnect the battery pack cable from the system board.

Attention: Do not pull the cable. Use your fingernail to disconnect the cable.

Figure 5. Disconnect the battery pack cable

Step 2. Remove four screws. Then, remove the battery pack.

Note: Remove five screws in 14-inch models.

Figure 6. Remove four screws and the battery pack

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Callout number Screw specifications Number of screws

2 M2 x 3.0 mm 3

3 M2 x 4.0 mm 1*

* 2 screws for 14-inch models.

Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following replacement part:

Battery pack

Remove the coin-cell battery Make sure the following FRU (or CRU) has been removed.

Remove the lower case on page 28

Step 1. Disconnect the battery pack cable from the system board.

Attention: Do not pull the cable. Use your fingernail to disconnect the cable.

Figure 7. Disconnect the battery pack cable

Step 2. Disconnect the coin-cell battery cable from the system board and remove the coin-cell battery.

Chapter 4. Removing a FRU or CRU 31

Figure 8. Disconnect the coin-cell battery cable and remove the coin-cell battery

Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following replacement part:

Coin-cell battery

Remove the speakers Make sure the following FRU (CRU) has been removed:

Remove the lower case on page 28

Step 1. Disconnect the battery pack cable.

Attention: Do not pull the cable. Use your fingernail to disconnect the cable.

Figure 9. Disconnect the battery pack cable

32 Lenovo Thinkbook series Hardware Maintenance Manual

Step 2. Disconnect the speaker cable and remove the speakers.

Figure 10. Disconnect the speaker cable and remove the speakers

Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following replacement part:

Speakers

Remove the M.2 solid-state drive Make sure the following FRU (or CRU) has been removed.

Remove the lower case on page 28

Step 1. Disconnect the battery pack cable.

Attention: Do not pull the cable. Use your fingernail to disconnect the cable.

Chapter 4. Removing a FRU or CRU 33

Figure 11. Disconnect the battery pack cable

Step 2. Remove one screw and slide the M.2 solid-state drive out of the slot.

Figure 12. Remove one screw and slide the M.2 solid-state drive out of the slot

Screw specifications Number of screws

M2 x 3.0 mm 1

Step 3. Peel the sticker and remove the SSD AL foil from the SSD.

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Figure 13. Peel the sticker and remove the SSD foil from the SSD.

Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following replacement parts:

M.2 solid-state drive

SSD 2242 (2280) AL foil

Remove the M.2 solid-state drive thermal pad Make sure the following FRU (or CRU) has been removed.

Remove the lower case on page 28

Remove the M.2 solid-state drive on page 33

Step 1. Remove the M.2 solid-state drive thermal pad.

Figure 14. Remove the M.2 solid-state drive thermal pad

Chapter 4. Removing a FRU or CRU 35

Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following replacement part:

SSD thermal pad

Remove the thermal choke pad Make sure the following FRU (CRU) has been removed.

Remove the lower case on page 28

Step 1. Remove the thermal choke pad.

Figure 15. Remove the thermal choke pad

Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following replacement part:

Thermal choke pad

Remove the WLAN card Make sure the following FRU (or CRU) has been removed.

Remove the lower case on page 28

Step 1. Disconnect the battery pack cable from the system board.

Attention: Do not pull the cable. Use your fingernail to disconnect the cable.

36 Lenovo Thinkbook series Hardware Maintenance Manual

Figure 16. Disconnect the battery pack cable

Step 2. Remove the mylar from the WLAN card.

Figure 17. Remove the mylar from the WLAN card

Step 3. Disconnect the cables from the WLAN card. Then, remove one screw.

Chapter 4. Removing a FRU or CRU 37

Figure 18. Disconnect the cables from the WLAN card and remove one screw

Screw specifications Number of screws

M2 x 3.0 mm 1

Step 4. Slide the WLAN card out of the slot.

Figure 19. Slide the WLAN card out of the slot

Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following replacement part:

WLAN card

Remove the fan Make sure the following FRU (or CRU) has been removed.

38 Lenovo Thinkbook series Hardware Maintenance Manual

Remove the lower case on page 28

Step 1. Disconnect the battery pack cable from the system board.

Attention: Do not pull the cable. Use your fingernail to disconnect the cable.

Figure 20. Disconnect the battery pack cable

Step 2. Disconnect the fan cable from the system board.

Figure 21. Disconnect the fan cable from the system board

Step 3. Remove two screws and remove the fan.

Chapter 4. Removing a FRU or CRU 39

Figure 22. Remove two screws and remove the fan

Screw specifications Number of screws

M2 x 5.0 mm 2

Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following replacement part:

Fan

Remove the heat sink Make sure the following FRU (or CRU) has been removed.

Remove the lower case on page 28

Step 1. Disconnect the battery pack cable from the system board.

Attention: Do not pull the cable. Use your fingernail to disconnect the cable.

40 Lenovo Thinkbook series Hardware Maintenance Manual

Figure 23. Disconnect the battery pack cable

Step 2. Remove four screws and remove the heat sink.

Figure 24. Remove four screws and remove the heat sink

Screw specifications Number of screws

M2 x 3 mm 4

Note: Remove six screws to remove the heat sink in the DIS model.

Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following replacement part:

Heat sink

Chapter 4. Removing a FRU or CRU 41

Remove the HDD Make sure the following FRU (or CRU) has been removed.

Remove the lower case on page 28

Step 1. Disconnect the battery pack cable.

Attention: Do not pull the cable. Use your fingernail to disconnect the cable.

Figure 25. Disconnect the battery pack cable

Step 2. Remove four screws and remove the HDD with bracket.

Figure 26. Remove four screws and remove the HDD with bracket

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Screw specifications Number of screws

M2 x 3.0 mm 4

Step 3. Remove the HDD AL foil.

Figure 27. Remove the HDD AL foil

Step 4. Remove four screws and remove the HDD from the HDD bracket.

Figure 28. Remove four screws and remove the HDD from the HDD bracket

Screw specifications Number of screws

M3 x 3.0 mm 4

Chapter 4. Removing a FRU or CRU 43

Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following replacement parts:

HDD

HDD bracket

HDD AL foil

Remove the memory module Make sure the following FRU (or CRU) has been removed.

Remove the lower case on page 28

Step 1. Disconnect the battery pack cable.

Attention: Do not pull the cable. Use your fingernail to disconnect the cable.

Figure 29. Disconnect the battery pack cable

Step 2. Remove the memory module shield.

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Figure 30. Remove the memory module shield

Step 3. Remove the memory module.

Figure 31. Remove the memory module

Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following replacement part:

Memory module

Remove the DC-in cable Make sure the following FRU (or CRU) have been removed.

Remove the lower case on page 28

Step 1. Disconnect the battery pack cable

Chapter 4. Removing a FRU or CRU 45

Attention: Do not pull the cable. Use your fingernail to disconnect the cable.

Figure 32. Disconnect the battery pack cable

Step 2. Remove two screws on the left hinge. Then, open the left hinge.

Figure 33. Remove two screws and open the left hinge

Screw specifications Number of screws

M2.5 x 5.5 mm 2

Step 3. Disconnect the DC-in cable from the system board. Then, remove the DC-in cable.

46 Lenovo Thinkbook series Hardware Maintenance Manual

Figure 34. Disconnect the DC-in cable from the system board and remove the DC-in cable

Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement part:

DC-in cable

Remove the I/O board brackets Make sure the following FRU (or CRU) has been removed.

Remove the lower case on page 28

Step 1. Disconnect the battery pack cable.

Attention: Do not pull the cable. Use your fingernail to disconnect the cable.

Chapter 4. Removing a FRU or CRU 47

Figure 35. Disconnect the battery pack cable

Step 2. Remove two screws and lift the left hinge slightly.

Figure 36. Remove two screws and lift the left hinge slightly

Screw specifications Number of screws

M2.5 x 5.5 mm 2

Step 3. Remove two screws. Then, remove the I/O board brackets.

48 Lenovo Thinkbook series Hardware Maintenance Manual

Figure 37. Remove two screws and remove the I/O board brackets

Screw specifications Number of screws

M2 x 3.0 mm 2

Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following replacement part:

I/O board brackets

Remove the I/O board Make sure the following FRU (or CRU) has been removed.

Remove the lower case on page 28

Remove the I/O board brackets on page 47

Step 1. Remove two screws on the left hinge. Then, open the left hinge.

Chapter 4. Removing a FRU or CRU 49

Figure 38. Remove two screws and open the left hinge

Screw specifications Number of screws

M2.5 x 5.5 mm 2

Step 2. Disconnect the connectors from the I/O board. Then, remove the I/O board.

Figure 39. Disconnect the connectors from the I/O board and remove the I/O board

Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following replacement part:

I/O board

50 Lenovo Thinkbook series Hardware Maintenance Manual

Remove the power button board Make sure the following FRU (or CRU) has been removed.

Remove the lower case on page 28

Step 1. Disconnect the battery pack cable.

Attention: Do not pull the cable. Use your fingernail to disconnect the cable.

Figure 40. Disconnect the battery pack cable

Step 2. Remove two screws on the left hinge. Then, open the left hinge.

Figure 41. Remove two screws and open the left hinge

Chapter 4. Removing a FRU or CRU 51

Screw specifications Number of screws

M2.5 x 5.5 mm 1

Step 3. Remove one screw.

Figure 42. Remove one screw

Screw specifications Number of screws

M2 x 3.0 mm 1

Step 4. Remove the power button board.

Figure 43. Remove the power button board

Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following replacement part:

52 Lenovo Thinkbook series Hardware Maintenance Manual

Power button board

Remove the power button Make sure the following FRU (or CRU) has been removed.

Remove the lower case on page 28

Remove the I/O board on page 49

Remove the power button board on page 51

Step 1. Disconnect the battery pack cable.

Attention: Do not pull the cable. Use your fingernail to disconnect the cable.

Figure 44. Disconnect the battery pack cable

Step 2. Disconnect the power button cable.

Chapter 4. Removing a FRU or CRU 53

Figure 45. Disconnect the power button cable

Step 3. Remove two screws. Then, remove the power button.

Figure 46. Remove two screws and the power button

Screw specifications Number of screws

M2 x 3.0 mm 2

Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following replacement part:

Power button

54 Lenovo Thinkbook series Hardware Maintenance Manual

Remove the system board Make sure the following FRUs (or CRUs) have been removed.

Remove the lower case on page 28

Remove the battery pack on page 30

Remove the M.2 solid-state drive on page 33

Remove the M.2 solid-state drive thermal pad on page 35

Remove the thermal choke pad on page 36

Remove the WLAN card on page 36

Remove the fan on page 38

Remove the heat sink on page 40

Remove the coin-cell battery on page 31

Remove the I/O board brackets on page 47

Step 1. Disconnect cables connected to the system board.

Figure 47. Disconnect cables

Step 2. Remove two screws and open the right hinge.

Chapter 4. Removing a FRU or CRU 55

Figure 48. Remove two screws and open the right hinge

Screw specifications Number of screws

M2.5 x 5.5 mm 2

Step 3. Remove three screws. Then, remove the system board.

Figure 49. Remove three screws the system board

Screw specifications Number of screws

M2 x 3.0 mm 3

Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following replacement part:

System board

56 Lenovo Thinkbook series Hardware Maintenance Manual

Remove the touch pad Make sure the following FRUs (or CRUs) have been removed.

Remove the lower case on page 28

Remove the battery pack on page 30

Remove the system board on page 55

Step 1. Remove the foil on the screws.

Figure 50. Remove the foil on the screws

Step 2. Remove three screws. Then, remove the touch pad bracket.

Figure 51. Remove three screws and the touch pad bracket

Chapter 4. Removing a FRU or CRU 57

Screw specifications Number of screws

M2 x 2.0 mm 3

Step 3. Remove the touch pad mylar.

Figure 52. Remove the touch pad mylar

Step 4. Remove three screws. Then, remove the touch pad.

Figure 53. Remove three screws and remove the touch pad

Screw specifications Number of screws

M2 x 1.7 mm 3

Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following replacement parts:

58 Lenovo Thinkbook series Hardware Maintenance Manual

Touch pad bracket

Touch pad

Remove the upper case Make sure the following FRU (CRU) has been removed.

Remove the lower case on page 28

Step 1. Disconnect the battery pack cable from the system board.

Attention: Do not pull the cable. Use your fingernail to disconnect the cable.

Figure 54. Disconnect the battery pack cable

Step 2. Remove the mylar from the WLAN cables. Then, disconnect the WLAN cables and LCD cable.

Chapter 4. Removing a FRU or CRU 59

Figure 55. Disconnect the WLAN cables and LCD cable

Step 3. Remove four screws.

Figure 56. Remove four screws

Screw specifications Number of screws

M2.5 x 5.5 mm 4

Step 4. Open the hinges.

60 Lenovo Thinkbook series Hardware Maintenance Manual

Figure 57. Open the hinges

Step 5. Rotate the upper case to an angle no less than 90 degrees and remove the upper case.

Attention: When disassembling the upper case, handle the LCD module and upper case with care.

Figure 58. Rotate the upper case to an angle no less than 90 degrees and remove the upper case

Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following replacement part:

Upper case

Remove the LCD bezel Make sure the following FRU (or CRU) has been removed.

Remove the lower case on page 28

Chapter 4. Removing a FRU or CRU 61

Remove the upper case on page 59

Step 1. Remove the hinge cap.

Figure 59. Remove the hinge cap

Step 2. Use the pry tool to remove the LCD bezel.

Figure 60. Use the pry tool to remove the LCD bezel

Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following replacement parts:

Hinge cap

LCD bezel

62 Lenovo Thinkbook series Hardware Maintenance Manual

Remove the LCD panel Make sure the following FRUs (CRUs) have been removed.

Remove the lower case on page 28

Remove the upper case on page 59

Remove the LCD bezel on page 61

Step 1. Remove six screws.

Figure 61. Remove six screws

Callout number Screw specifications Number of screws

1 M2.5 x 2.5 mm 4

2 M2.5 x 3.5 mm 2

Step 2. Remove the hinges.

Chapter 4. Removing a FRU or CRU 63

Figure 62. Remove the hinges

Step 3. Remove the removable tapes.

Figure 63. Remove the removable tapes

Step 4. Carefully lift the LCD panel from the LCD cover.

64 Lenovo Thinkbook series Hardware Maintenance Manual

Figure 64. Carefully ift the LCD panel from the LCD cover

Step 5. Open the EDP cable lock and disconnect the EDP cable from the LCD panel.

Figure 65. Remove the EDP cable

Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement part:

LCD panel

Remove the camera module Make sure the following FRUs (or CRUs) have been removed.

Remove the lower case on page 28

Remove the upper case on page 59

Remove the LCD panel on page 63

Chapter 4. Removing a FRU or CRU 65

Remove the LCD bezel on page 61

Step 1. Disconnect the camera connector.

Figure 66. Disconnect the camera connector

Step 2. Remove the camera cable.

Figure 67. Remove the camera cable

Step 3. Remove the camera module.

66 Lenovo Thinkbook series Hardware Maintenance Manual

Figure 68. Remove the camera module

Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement parts:

Camera module

Chapter 4. Removing a FRU or CRU 67

68 Lenovo Thinkbook series Hardware Maintenance Manual

Trademarks LENOVO and the LENOVO logo are trademarks of Lenovo.

All other trademarks are the property of their respective owners. 2019 Lenovo.

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