Contents

Dell Chromebook 11 3189 Laptop Disassembly Guide PDF

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Summary of Content for Dell Chromebook 11 3189 Laptop Disassembly Guide PDF

Chromebook 11 3189 Disassembly and Reassembly Guide - For use by Dell

Certified Technicians only

Regulatory Model: P26T Regulatory Type: P26T001 Jun 2021 Rev. A03

Notes, cautions, and warnings

NOTE: A NOTE indicates important information that helps you make better use of your product.

CAUTION: A CAUTION indicates either potential damage to hardware or loss of data and tells you how to avoid

the problem.

WARNING: A WARNING indicates a potential for property damage, personal injury, or death.

2018 - 2019 Dell Inc. or its subsidiaries. All rights reserved. Dell, EMC, and other trademarks are trademarks of Dell Inc. or its subsidiaries. Other trademarks may be trademarks of their respective owners.

Chapter 1: Working on your computer........................................................................................... 5 Safety instructions.............................................................................................................................................................. 5 Storing Chromebooks for long term - best practices.................................................................................................5 Before working inside your computer.............................................................................................................................6 After working inside your computer................................................................................................................................6

Chapter 2: Removing and installing components........................................................................... 8 Recommended tools........................................................................................................................................................... 8 microSD card........................................................................................................................................................................ 8

Removing microSD card...............................................................................................................................................8 Installing microSD card.................................................................................................................................................8

Base cover.............................................................................................................................................................................9 Removing base cover....................................................................................................................................................9 Installing base cover.................................................................................................................................................... 10

Battery..................................................................................................................................................................................10 Lithium-ion battery precautions............................................................................................................................... 10 Removing battery..........................................................................................................................................................11 Installing battery............................................................................................................................................................11

Keyboard.............................................................................................................................................................................. 12 Removing keyboard..................................................................................................................................................... 12 Installing keyboard........................................................................................................................................................14

Power switch board.......................................................................................................................................................... 15 Removing power switch board................................................................................................................................. 15 Installing power switch board....................................................................................................................................16

Audio board..........................................................................................................................................................................16 Removing audio board.................................................................................................................................................16 Installing audio board................................................................................................................................................... 17

Power connector port....................................................................................................................................................... 17 Removing power connector port..............................................................................................................................17 Installing power connector port................................................................................................................................18

Speaker.................................................................................................................................................................................19 Removing speaker........................................................................................................................................................19 Installing speakers....................................................................................................................................................... 20

Display assembly................................................................................................................................................................20 Removing display assembly.......................................................................................................................................20 Installing display assembly......................................................................................................................................... 23

Display back cover............................................................................................................................................................ 24 Removing display back cover................................................................................................................................... 24 Installing display back cover..................................................................................................................................... 25

System board..................................................................................................................................................................... 25 Removing system board............................................................................................................................................ 25 Installing system board...............................................................................................................................................28

Palm rest............................................................................................................................................................................. 29 Replacing palm rest.....................................................................................................................................................29

Contents

Contents 3

Chapter 3: Product specification................................................................................................. 31

Chapter 4: Software....................................................................................................................33 Operating system.............................................................................................................................................................. 33

Chrome OS....................................................................................................................................................................33 Verified Boot.................................................................................................................................................................34 Disk Partition Map.......................................................................................................................................................35 Developer and Recovery mode................................................................................................................................ 36 Coreboot and U-boot Custom Firmware............................................................................................................... 36 Chrome vs Chromium OS..........................................................................................................................................36

View system information................................................................................................................................................. 37 Dell activity light................................................................................................................................................................ 39

Overview....................................................................................................................................................................... 39 Raise your Hand/Answer Question/Discussion buttons....................................................................................40 MultiColor Poll .............................................................................................................................................................40

Chapter 5: Technology and components...................................................................................... 42 Keyboard..............................................................................................................................................................................42

Keyboard keys function..............................................................................................................................................42 Touchpad.............................................................................................................................................................................44 Integrated microphone.....................................................................................................................................................45

Key features................................................................................................................................................................. 45 Typical applications..................................................................................................................................................... 45

Bluetooth.............................................................................................................................................................................45

Chapter 6: Diagnostic and troubleshooting..................................................................................47 Basic troubleshooting....................................................................................................................................................... 47

Power issues................................................................................................................................................................. 47 CROSH................................................................................................................................................................................. 51 CROSH commands........................................................................................................................................................... 52 Chrome commands........................................................................................................................................................... 54 Commonly used CROSH command.............................................................................................................................. 59

Check battery charging status.................................................................................................................................59 Reset Chromebook........................................................................................................................................................... 66 Recovery Chromebook.................................................................................................................................................... 69

Recovering the Chromebook....................................................................................................................................69

Chapter 7: Contacting Dell.......................................................................................................... 72

4 Contents

Working on your computer

Topics:

Safety instructions Storing Chromebooks for long term - best practices Before working inside your computer After working inside your computer

Safety instructions Use the following safety guidelines to protect your computer from potential damage and to ensure your personal safety. Unless otherwise noted, each procedure included in this document assumes that the following conditions exist:

You have read the safety information that shipped with your computer. A component can be replaced or, if purchased separately, installed by performing the removal procedure in reverse order.

NOTE: Disconnect all power sources before opening the computer cover or panels. After you finish working inside the

computer, replace all covers, panels, and screws before connecting to the power source.

NOTE: Before working inside your computer, read the safety information that shipped with your computer. For additional

safety best practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance

CAUTION: Many repairs may only be done by a certified service technician. You should only perform

troubleshooting and simple repairs as authorized in your product documentation, or as directed by the online or

telephone service and support team. Damage due to servicing that is not authorized by Dell is not covered by

your warranty. Read and follow the safety instructions that came with the product.

CAUTION: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically

touching an unpainted metal surface, such as a connector on the back of the computer.

CAUTION: Handle components and cards with care. Do not touch the components or contacts on a card. Hold a

card by its edges or by its metal mounting bracket. Hold a component such as a processor by its edges, not by

its pins.

CAUTION: When you disconnect a cable, pull on its connector or on its pull-tab, not on the cable itself. Some

cables have connectors with locking tabs; if you are disconnecting this type of cable, press in on the locking

tabs before you disconnect the cable. As you pull connectors apart, keep them evenly aligned to avoid bending

any connector pins. Also, before you connect a cable, ensure that both connectors are correctly oriented and

aligned.

NOTE: The color of your computer and certain components may appear differently than shown in this document.

Storing Chromebooks for long term - best practices Prior to long term (Summer) storage: 1. Update to the latest version of the Chrome OS and charge your Chromebooks so that the battery is at least 80% full.

a. This ensures that even when the battery discharges while unplugged over the summer, it will not fully run out of power. 2. Connect the device to a charger and then turn it on.

3. Hold Refresh and Power keys at the same time. 4. While holding these keys, remove the power cable from the device and then release the keys. The device should shut down

and remain off.

1

Working on your computer 5

5. Attempt to power the unit on, by pressing the power button. If the unit does not power on, you have completed the steps and can safely store the system. If the unit powers on, you should repeat steps 2 to 4.

Upon redeploying: 1. Connect the Chromebooks to a charger and a power source, which will get them out of the battery disconnect state. Power

up your device. 2. Connect your Chromebooks to WiFi and update them to the latest Chrome OS release.

a. This can take time, as multiple Chrome OS versions may have been released since the last time the device was updated.

Before working inside your computer

Steps

1. Ensure that your work surface is flat and clean to prevent the computer cover from being scratched.

2. Turn off your computer.

3. If the computer is connected to a docking device (docked), undock it.

CAUTION: To disconnect a network cable, first unplug the cable from your computer and then unplug the

cable from the network device.

4. Disconnect all network cables from the computer.

5. Disconnect your computer and all attached devices from their electrical outlets.

6. Close the display and turn the computer upside-down on a flat work surface.

NOTE: To avoid damaging the system board, you must remove the main battery before you service the computer.

7. Remove the base cover.

8. Remove the main battery.

9. Turn the computer top-side up.

10. Open the display.

11. Press and hold the power button for few seconds, to ground the system board.

CAUTION: To guard against electrical shock, always unplug your computer from the electrical outlet before

opening the display.

CAUTION: Before touching anything inside your computer, ground yourself by touching an unpainted metal

surface, such as the metal at the back of the computer. While you work, periodically touch an unpainted

metal surface to dissipate static electricity, which could harm internal components.

12. Remove any installed ExpressCards or Smart Cards from the appropriate slots.

After working inside your computer

About this task

After you complete any replacement procedure, ensure you connect any external devices, cards, and cables before turning on your computer.

CAUTION: To avoid damage to the computer, use only the battery designed for this particular Dell computer. Do

not use batteries designed for other Dell computers.

Steps

1. Replace the battery.

2. Replace the base cover.

3. Connect any external devices, such as a port replicator or media base, and replace any cards, such as an ExpressCard.

4. Connect any telephone or network cables to your computer.

6 Working on your computer

CAUTION: To connect a network cable, first plug the cable into the network device and then plug it into the

computer.

5. Connect your computer and all attached devices to their electrical outlets.

6. Turn on your computer.

Working on your computer 7

Removing and installing components This section provides detailed information on how to remove or install the components from your computer.

Topics:

Recommended tools microSD card Base cover Battery Keyboard Power switch board Audio board Power connector port Speaker Display assembly Display back cover System board Palm rest

Recommended tools The procedures in this document require the following tools: Phillips #0 screwdriver Phillips #1 screwdriver Plastic scribe

microSD card

Removing microSD card

Steps

1. Follow the procedure in Before working inside your computer.

2. Press in on the microSD card to release it from the computer.

3. Remove the microSD card from the computer.

Installing microSD card

Steps

1. Slide the SD card into its slot until it clicks into place.

2. Install the microSD card.

3. Follow the procedure in After working inside your computer.

2

8 Removing and installing components

Base cover

Removing base cover

Steps

1. Follow the procedure in Before working inside your computer.

2. Remove the microSD card.

3. To remove the base cover:

a. Remove the mylar cap [1].

NOTE: The screw cover on the base cover is made up of a mylar sticker. To remove this screw, use a regular philips

driver and puncture the mylar cover. Once the mylar caps are removed it cannot replaced, and the screws will be

exposed from that point forward.

b. Loosen the M2.5x7 captive screws that secure the base cover to the computer [2] .

c. Pry the base cover from the edge.

NOTE: You may need a 3c plastic scribe to pry the base cover from the edge.

4. Lift the base cover away from the computer.

Removing and installing components 9

Installing base cover

Steps

1. Toe in the base cover front edge into the system.

2. Press the edges of the cover until it clicks into place.

3. Replace the M2.5x7 screws to secure the base cover to the computer.

4. Install the microSD card

5. Follow the procedure in After working inside your computer.

Battery

Lithium-ion battery precautions

CAUTION:

Exercise caution when handling Lithium-ion batteries.

Discharge the battery as much as possible before removing it from the system. This can be done by

disconnecting the AC adapter from the system to allow the battery to drain.

Do not crush, drop, mutilate, or penetrate the battery with foreign objects.

Do not expose the battery to high temperatures, or disassemble battery packs and cells.

Do not apply pressure to the surface of the battery.

Do not bend the battery.

Do not use tools of any kind to pry on or against the battery.

Ensure any screws during the servicing of this product are not lost or misplaced, to prevent accidental

puncture or damage to the battery and other system components.

10 Removing and installing components

If a battery gets stuck in a device as a result of swelling, do not try to free it as puncturing, bending, or

crushing a Lithium-ion battery can be dangerous. In such an instance, contact for assistance and further

instructions.

If the battery gets stuck inside your computer as a result of swelling, do not try to release it as puncturing,

bending, or crushing a lithium-ion battery can be dangerous. In such an instance, contact Dell technical

support for assistance. See www.dell.com/contactdell.

Always purchase genuine batteries from www.dell.com or authorized Dell partners and resellers.

Removing battery

Steps

1. Follow the procedure in Before working inside your computer.

2. Remove the:

a. microSD card b. base cover

3. To remove the battery:

a. Disconnect the battery cable from the connector on the system board [1]. b. Remove the M2.0x3.0 screws that secure the battery to the computer [2]. c. Lift the battery away from the computer [3].

Installing battery

Steps

1. Insert the battery into the slot on the computer.

2. Connect the battery cable to the connector on the battery.

3. Replace the M2.0x3.0 screws to secure the battery to the computer.

Removing and installing components 11

4. Install the:

a. base cover b. microSD card

5. Follow the procedure in After working inside your computer.

Keyboard

Removing keyboard

Steps

1. Follow the procedure in Before working inside your computer.

2. Remove the:

a. microSD card b. base cover c. battery

3. To remove keyboard:

a. Disconnect the keyboard cable from the system board [1]. b. Use the plastic scribe to the release the keyboard [2].

NOTE: The two release holes for the keyboard are indicated by the "KB" labeling.

4. Slide the keyboard outwards, away from the computer.

12 Removing and installing components

NOTE: Carefully pull the keyboard connector through the gap in the palm rest.

5. Lift the keyboard away from the computer.

Removing and installing components 13

Installing keyboard

Steps

1. Align the keyboard trim with the tabs on the computer, and press it until it clicks into place.

2. Connect the keyboard cable on the system board.

3. Install the:

14 Removing and installing components

a. battery b. base cover c. microSD card

4. Follow the procedure in After working inside your computer.

Power switch board

Removing power switch board

Steps

1. Follow the procedure in Before working inside your computer.

2. Remove the:

a. microSD card b. base cover c. battery

3. To remove the power switch:

a. Disconnect the power switch cable from the power switch board [1]. b. Remove the M.2.0x3.0 screws that secure the power switch board on the computer [2]. c. Lift the power switch board away from the computer [3].

Removing and installing components 15

Installing power switch board

Steps

1. Align the screw hole on the power switch board into the slot on the computer.

2. Replace the M2.0x3.0 screws that secure the power switch board to the computer.

3. Connect the power switch cable to the connector on the power switch board.

4. Install the:

a. battery b. base cover c. microSD card

5. Follow the procedure in After working inside your computer.

Audio board

Removing audio board

Steps

1. Follow the procedure in Before working inside your computer.

2. Remove the:

a. microSD card b. base cover c. battery

3. To remove the audio board:

a. Disconnect the audio cable from the connector on the audio board [1]. b. Remove the M.2.0x3.0 screw that secures the audio board on the computer [2]. c. Lift the audio board away from the computer [3].

16 Removing and installing components

Installing audio board

Steps

1. Insert the audio board into the slot on the computer.

2. Replace the M2.0x3.0 screw that secure the audio board to the computer.

3. Connect the audio cable to the connector on the audio board.

4. Install the:

a. battery b. base cover c. microSD card

5. Follow the procedure in After working inside your computer.

Power connector port

Removing power connector port

Steps

1. Follow the procedure in Before working inside your computer.

2. Remove the:

a. microSD card b. base cover

Removing and installing components 17

c. battery

3. To remove the power connector port:

a. Disconnect the power connector cable from the connector on the system board [1]. b. Remove the M.2.0x3.0 screws that secure the power connector port on the computer [2]. c. Slide and lift the power connector port away from the computer [3].

Installing power connector port

Steps

1. Insert the power connector port into the slot on the computer.

2. Replace the M2.0x3.0 screw that secures the power connector port to the computer.

3. Connect the power connector cable to the connector on the system board.

4. Install the:

a. battery b. base cover c. microSD card

5. Follow the procedure in After working inside your computer.

18 Removing and installing components

Speaker

Removing speaker

Steps

1. Follow the procedure in Before working inside your computer.

2. Remove the:

a. microSD card b. base cover c. battery

3. To remove the speaker:

a. Disconnect the speaker cable from the connector on the system board [1]. b. Remove the adhesive tape that secures the speaker cable on the computer . c. Unroute the speaker cable from the routing channel [3].

4. Remove the speaker from the computer.

Removing and installing components 19

Installing speakers

Steps

1. Place the speakers into the slots on the computer.

2. Route the speaker cable through the retention clips through routing channel.

3. Affix the adhesive tape to secure the speaker cable on the computer.

4. Connect the speaker cable to the connector on the system board.

5. Install the:

a. battery b. base cover c. microSD card

6. Follow the procedure in After working inside your computer.

Display assembly

Removing display assembly

Steps

1. Follow the procedure in Before working inside your computer.

2. Remove the:

a. microSD card b. base cover c. battery

3. To remove cables:

a. Remove the screw M2.0x3.0 and lift the metal bracket that secures the WLAN card on the system board [1, 2] b. Disconnect the WLAN cables [3].

20 Removing and installing components

c. Remove the screws M2.0x.30 and lift the metal bracket that secures the display cable on the computer [4, 5] d. Lift the latch, and disconnect the cable [6]

4. Disconnect the sensor cable, and turn over the computer [1, 2]

Removing and installing components 21

5. To remove display assembly:

a. Remove the display hinge screws M2.0xM5.0 that secure the display assembly to the computer [1]. b. Lift the display assembly away from the computer [2].

22 Removing and installing components

Installing display assembly

Steps

1. Place the display assembly to align with the screw holders on the computer.

2. Replace the screws that secure the display hinges to the palm-rest assembly.

3. Flip over the computer and connect the sensor cable on the system board.

4. Connect the display cable to the connector on the system board.

5. Place the metal bracket over the (display cable) connector, and tighten the M2.0x3.0 screws to secure the display cable to the computer.

6. Connect the WLAN cables.

7. Place the metal bracket, and tighten the M2.0x3.0 screw to the WLAN cable on the system board.

8. Install the:

a. battery b. base cover c. microSD card

9. Follow the procedure in After working inside your computer.

Removing and installing components 23

Display back cover

Removing display back cover

Steps

1. Follow the procedure in Before working inside your computer.

2. Using the plastic scribe pry the edges of the display back cover.

3. Remove the display back cover away from the computer.

24 Removing and installing components

Installing display back cover

Steps

1. Align the display back cover with the tabs on the computer, and press it until it clicks into place.

2. Follow the procedure in After working inside your computer.

System board

Removing system board

Steps

1. Follow the procedure in Before working inside your computer.

2. Remove the:

a. microSD card b. base cover c. battery

3. Disconnect the following cables:

a. sensor cable [1] b. power board and audio cable [2] c. speaker cable [3] d. keyboard cable [4] e. touch pad cable [5] f. power connector cable [6]

4. To remove metal bracket on the system board:

Removing and installing components 25

a. Remove the screws on the metal bracket that secures the system board [1]. b. Lift the metal bracket off the system board [2].

5. To remove the metal bracket (WLAN and display cable):

a. Remove the M2.0x3.0 screw and lift the metal bracket that secures the WLAN card on the system board [1, 2] b. Disconnect the WLAN cables [3]. c. Remove the screws M2.0x.30 and lift the metal bracket that secures the display cable on the computer [4, 5] d. Lift the latch, and disconnect the cable [6]

26 Removing and installing components

6. To remove the system board:

a. Remove the screws that secure the system board on the palm rest assembly [1]. b. Lift the system board off the palm- rest assembly [2].

Removing and installing components 27

Installing system board

Steps

1. Align the system board with the screw holders on the computer.

2. Tighten the M2.0x3.0 screws to secure the system board to the computer.

3. Connect the display cable to the connector.

4. Place the metal bracket over the connector and tighten the M2.0x3.0 screws to secure the display cable to the computer.

5. Connect the WLAN cables.

6. Place the metal bracket, and tighten the M2.0x3.0 screw to the WLAN cable on the system board.

7. Place the metal and tighten M2.0x3.0 screws to secure on the system board.

8. Connect the following cables:

a. power connector cable b. touchpad cable c. keyboard cable d. speaker cable e. power board and audio cable f. sensor cable

9. Install the:

a. battery b. base cover c. microSD card

10. Follow the procedure in After working inside your computer.

28 Removing and installing components

Palm rest

Replacing palm rest

Steps

1. Follow the procedure in Before working inside your computer.

2. Remove the:

a. microSD card b. base cover c. battery d. keyboard e. power switch board f. audio g. power connector h. speaker i. display assembly j. system board

NOTE: Touchpad is not a standalone component and is assembled along with the palm rest.

NOTE: The component you are left with is the palm rest.

3. Install the following components on the new palm rest:

a. system board b. display assembly c. speaker d. power connector e. audio f. power switch board g. keyboard

Removing and installing components 29

h. battery i. base cover j. microSD card

4. Follow the procedure in After working inside your computer.

30 Removing and installing components

Product specification This section gives information about product specifications.

Table 1. Chrome 11 (3189) Product specification

Features Chromebook 11 (3189)

Processor Intel Celeron Processor N3060 (6 W, 2 M cache, up to 2.48 GHz) Intel Pentium N3710 (Quad Core, 1.6 GHz, 2 M cache, 6 W)

Operating System Google Chrome OS

Chipset Intel Braswell

Security Browser based security with hardware TPM: Phishing and malware, SSL certificates, content settings

Nobel Wedge Lock slot

Dimension Front Height: 20.75 mm

Back Height: 20.75 mm

Width: 303.8 mm

Depth: 207.9 mm

Weight 1462.10 g

Display 11.6 (1366 x 768) eDP 200 nits AntiGlare (With touch glass)

Graphics Intel HD Graphics

Memory LPDDR3 2 GB LPDDR3 4 GB

AC Adapter 65 W Dell E4 series AC adapter

Battery 3-cell lithium ion (42 Whr Rechargeable)

Audio Codec MAXIM I2S based codec MAX98090

Integrated Microphone Akustica AKU240 digital-output MEMS microphone

Primary Storage 16 GB Built In SanDisk eMMC storage

Connectivity Intel Dual Band Wireless-AC 7265 802.11AC Bluetooth: 4.0

Multimedia Stereo Speakers Webcam 720p

Ports and Slots 2 x USB 3.1 Gen 1 with BC 1.2 Charging 1 x HDMI 1.4a (Out) Universal Audio Jack DC-IN (7.4 mm) LEDs microSD card reader Noble wedge lock slot

Warranty 1 year onsite repair/service ProSupport with NBD Onsite Premium Phone Support In-Home

3

Product specification 31

Table 1. Chrome 11 (3189) Product specification (continued)

Features Chromebook 11 (3189)

1-4 years warranty extension options.

Multiple Display Options A connector is available for an external HDMI display up to 1080p

Dock Options N/A

Regulatory and Environmental Compliance Regulatory and product certification for US and EMEA

32 Product specification

Software This section provides information about the operating system, commands, and bundled software for Dell Chromebook 11 (3189).

Topics:

Operating system View system information Dell activity light

Operating system This page contains information about the operating system used by the Dell Chromebook 11 (3189).

Chrome OS

Chromebooks are powered by the Google Chrome operating system, based on Google's popular Chrome browser. It has been developed to provide a fast, simple, and more secure computing experience for users who spend most of their time online.

Key Benefits

Speed Simplicity Security Updatability Syncronisability High power at low cost Easy to learn and use Documents, calendar, e-mail, contacts, and tasks available online and offline, and all securely backed-up and synchronised in

the cloud. Access to the Chrome web app store

4

Software 33

Killer web apps The latest Intel Core processors Fun games Built-in support for popular file types and external devices

For more information about the Chrome OS, please visit the Chrome OS training page.

Verified Boot

Read Only firmware verifies the integrity of Read/Write (R/W) firmware. R/W firmware verifies the active Linux kernel. During run time, the kernel verifies each block read from disk.

If a verification step fails and there is no backup option, the machine enters recovery mode.

The Developer Mode switch turns off verified boot (at the Kernel stage) to enable users to run Chromium OS (or other OS). The BIOS is always verified.

34 Software

Disk Partition Map

There are two copies of Chrome OS on disk: an active copy and a backup copy. Each copy consists of a kernel partition and a root file system. The backup copy is updated automatically in the background. Users only need to reboot. The partition contains encrypted user data and is also used in the factory for storing test software.

Software 35

Developer and Recovery mode

Table 2. Developer and Recovery mode

Developer Mode Recovery Mode

Used to boot without verification. Can be turned on via key combination during boot. Stateful partition is wiped during transitions. Used in the factory to boot test image.

Allows a user to reinstall the Chrome OS from a USB key or SD card.

Recovery mode is entered if verified boot fails. A user can force recovery mode via a key combination

during boot.

Coreboot and U-boot Custom Firmware

Coreboot (x86 only)

Memory and chipset initialization Open-source, except for MRC binary from Intel.

U-Boot

Performs verified boot Handles recovery and Developer Mode Open source code

Normal boot is very fast, as it takes less than 1 second to start loading kernel. Chromebook does not boot other operating systems such as Windows or OS X.

Chrome vs Chromium OS

Table 3. Difference between Chromium and Chrome OS

Difference between Chromium and Chrome OS

Chromium OS Chrome OS

Is an open source project: http://www.chromium.org/ chromium-os

Runs on regular PCs and Chrome devices

Is based on Chromium OS Only runs on the Chrome devices with required hardware

features (TPM, RO firmware, recovery button, developer switch).

Includes additional licensed features such as the Netflix plugin, video codecs, and fonts

36 Software

View system information This page contains all the information about viewing system information for the Dell Chromebook.

Dell Chromebook 11 (3189) does not support Dell BIOS. Hence, there are several ways to check system specifications depending on the information you are searching for. The table below lists some of the most commonly used methods to view system information and specifications.

Table 4. View system information

Commands Action and Purpose Screenshot

Chrome:help View basic OS information.

Software 37

Table 4. View system information (continued)

Commands Action and Purpose Screenshot

Chrome:settin gs

View information such as screen resolution options (Device>Display settings), touchpad, and other basic hardware information.

Chrome:system View advanced system information such as the Google Chrome version, BIOS information, CPU information, memory information, network status, power supply information, etc.

38 Software

Table 4. View system information (continued)

Commands Action and Purpose Screenshot

Chrome:net- internals

View advanced networking information.

Dell activity light This page contains all the information about the Dell Bright Light software that is used to control Dell Activity Light.

Overview

Dell Activity Light can be used as an indicator for the interaction between school teacher and student, and Dell has designed a software over this feature. The application will not be factory installed when product RTS, but it can be downloaded and installed via the web-store through the following link: https://chrome.google.com/webstore/detail/dell- led/klhphccnhmdlnljpdljjhehlmplnmini

Software 39

Raise your Hand/Answer Question/Discussion buttons

Students can either click the on-screen button or press keyboard hot key to on/off the Ask question LED. The on-screen button can be the Chrome application in the menu or the shortcut icon on the task bar.

MultiColor Poll

Students can vote with different LED color by either clicking the on-screen button (suggested) or pressing keyboard hot key.

40 Software

Software 41

Technology and components This chapter details the technology and components available in the systems. Topics:

Keyboard Touchpad Integrated microphone Bluetooth

Keyboard Dell Chromebook 11 (3189) keyboards have a few extra features to help you browse the web effortlessly and efficiently. The keyboard contains a dedicated search key and a new row of web shortcut keys. A standard USB Windows keyboard can also be used with the Chromebook, using the same keyboard shortcuts. The image below shows the keyboard

layout.

Keyboard keys function

The Chrome device keyboard is designed to help you get to the things you need the most. The table below is an overview of the special keys on the top row of the keyboard:

Table 5. Special keys

Special keys

Go to the previous page in browser history

Go to the next page in browser history

Reload current page

Enter Immersive mode, which hides the tabs and launcher

5

42 Technology and components

Table 5. Special keys (continued)

Special keys

Enter Overview mode, which shows all windows

Decrease screen brightness

Increase screen brightness

Mute

Decrease the volume

Increase the volume

Search applications and the web at the same time. On a Chromebook, this key is on the side, where the Caps Lock key is normally located.

Keyboard shortcut keys

Table 6. Shortcut keys

Shortcut keys

Function Combination keys

Page up Press Alt and the up arrow

Page down Press Alt and the down arrow

Home Press Ctrl+Alt, and the up arrow

End Press, Ctrl+Alt and the down arrow

Delete Press Alt+Backspace

Toggle the bookmark bar Ctrl+Shift+B

Search current webpage Ctrl+F

Open a new tab Ctrl+T

Open a new window Ctrl+N

Open the link you clicked in a new background tab Press Alt and click a link

Switch to next tab Ctrl+Tab

Switch to next window Switch to next window

Sign out of Google Account Ctrl+Shift+Q

Close current tab Ctrl+W

To see more shortcuts, simply press Ctrl+Alt+? To open the keyboard viewer on your screen.

Technology and components 43

Touchpad This page contains information for Dell Chromebook 11 (3189) touchpad gestures.

The following table lists some gestures and actions supported by the Chromebook touchpad:

Table 7. Touch pad gestures

Touchpad gestures

Gestures Explanation

Simply move your finger across the touchpad.

Press down on the lower half of the touchpad. Since tap-to-click is enabled by default, you can quickly tap the touchpad to click.

Click the touchpad with two fingers.

Place two fingers on the touchpad and move them up and down to scroll vertically, left and right to scroll horizontally. If you have Australian scrolling enabled, move two fingers up to scroll down. (It works in the same way as say, your smartphone or tablet.) If you have multiple browser tabs open, you can also swipe left and right with three fingers to quickly move between tabs.

Swipe Quickly move two fingers left or right to go backward or forward on web pages or while using apps.

Click the item you want to move with one finger. With a second finger, move the item. Release both fingers to drop the item at its new location.

44 Technology and components

Integrated microphone This page contains all the information about the Dell Chromebook 11 (3189) integrated microphone.

Akustica AKU240 is an HD Voice quality, top port, digital output MEMS microphone in a small 4.0 x 3.0 x 1.0 mm package. The robust digital output stream from the AKU240 is virtually immune to all forms of Radio Frequency Interference (RFI) and Electromagnetic Interference (EMI) allowing the microphone to be integrated anywhere on the platform regardless of proximity to displays, the Wi-Fi antennae, or other sources of interference that would degrade the signal of conventional analog microphones. For the device manufacturer, this translates to a higher degree of design flexibility by providing a consistent SNR level regardless of environment, resulting in shorter design cycles.

The output of the microphone is pulse density modulated (PDM), a single-bit digital output stream designed to enable the multiplexing of stereo microphone data onto a single wire. With a user selectable Left/Right channel option, the AKU240 is ideal for use in multiple microphone applications.

Key features

Digital MEMS Microphone with PDM (pulse density modulation) output Excellent acoustic performance with 63 dB SNR Compatible with Microsoft Windows 8 and Intel Ultrabook Requirements for Digital Microphones Tightly controlled sensitivity of -26 dBFS +/- 2 dB Robust digital-output immune to RF/EM interference Matched microphones in frequency and phase response for array applications Output supports dual-microphone, single-wire multiplexing Industry standard microphone interface compatible with multiple

codecs. Low current power-down mode Lead-free surface-mountable and RoHS2 compliant Halogen-free in accordance with IEC61249-2-21 Thin profile, SMT packaging Industry-standard package of 4.00 x 3.00 x 1.00 mm

Typical applications

Ultrabooks Mobile phones Media tablets eReaders Microphone arrays Webcams and camera modules

Bluetooth This section outlines the instruction to pair a bluetooth device with your Chrome devices.

Bluetooth technology lets you connect devices wirelessly over short distances. To use the Bluetooth accessories with your Chromebook, first check if your Chromebook supports Bluetooth. You will then need to pair it with the accessory.

To see if you can use the Bluetooth accessories with your Chromebook, click the status area in the lower right corner, where

your account picture appears. If you see the Bluetooth icon or in the menu, your Chromebook supports Bluetooth. If you do not see either of these icons, your Chromebook does not support Bluetooth. If your Chromebook supports Bluetooth, it can connect to a wide range of the Bluetooth accessories, including the following:

Keyboards Mice Speakers Headphones Headsets (audio only)

Technology and components 45

To connect a Bluetooth device with your Chromebook, you need to pair them. Here is how:

1. Sign in to your Chromebook. 2. Click the status area in the lower-right corner, where your account picture appears. 3. Select your Bluetooth status in the menu that appears.

4. If Bluetooth is disconnected, click the disconnected icon. or click Enable Bluetooth in the menu. Your Chromebook will automatically begin scanning for available Bluetooth devices.

5. Pick the device you want to add from the list of available Bluetooth devices and click Connect. 6. Follow the instructions on the screen to connect your Bluetooth device.

If you are connecting a mouse, no PIN is normally required. If you are prompted for a PIN, enter the PIN for your mouse using your Chrome device's keyboard.

If you are connecting a keyboard, enter the randomly generated PIN on the keyboard you wish to pair and press Enter.

To confirm that your Bluetooth device is connected, check the Bluetooth status. You should see your device listed there.

NOTE: Just got your Chromebook or Chromebox? If you are turning on your chrome device for the first time and you have

a Bluetooth device nearby that is also turned on, your chrome device may automatically detect the device and show you

steps to pair it. You will see these instructions only if your chrome device does not already have a similar device connected

or its functionality is not built in, like a keyboard or trackpad.

46 Technology and components

Diagnostic and troubleshooting This section covers the diagnostics tool and troubleshooting information for field service technicians.

Topics:

Basic troubleshooting CROSH CROSH commands Chrome commands Commonly used CROSH command Reset Chromebook Recovery Chromebook

Basic troubleshooting This page contains all the information for Dell Chromebook 11 (3189) basic troubleshooting

NOTE: Refer to Google Help Center for the online troubleshooter.

NOTE: Resetting the Chromebook, also known as Powerwash, can be attempted before Recovering the Chromebook.

Recovering the Chromebook is the last resort.

Power issues

Table 8. Power issue

Power issues

Issue Possible solutions

Chromebook would not Power On

If the Chromebook will not turn on, follow these steps: 1. Remove all external devices.

a. If the Chromebook starts, reconnect devices one at a time while restarting the computer to figure out which device is causing the problem. You are done.

b. If the Chromebook still does not start or exhibits the same problem, do not reconnect anything, and continue troubleshooting.

2. The battery life might be too low. Plug the Chromebook into the AC adapter and let it charge for at least an hour and try turning it on again.

NOTE: When a new Chromebook is used for the first time, the battery is still in shipping mode. To resolve this issue, turn off the Chromebook and plug in the AC adapter and turn on the Chromebook again.

3. Depending on the Chromebook you have, you may see a power indicator light close to the charging port. If you have let the Chromebook charge and the light is not coming on, perform a hard reset.

NOTE: You can perform a hard reset by pressing Refresh + Power.

4. Use a different AC adapter with the same power voltage.

6

Diagnostic and troubleshooting 47

Table 8. Power issue (continued)

Power issues

5. Remove the AC adapter, and turn on with the battery power only.

Display issue

Table 9. Display issue

Display issue

Issue Possible solutions

Screen is Blank

If the Chromebook's screen is blank, try the following troubleshooting steps to resolve the issue, checking to see if the screen turns on after each step: 1. Make sure the Chromebook is on. If you are using the

battery, plug the Chromebook in and press the power button.

2. Restart the Chromebook by holding the power button down until the device turns off, then turn it back on again.

3. Reset or Recover the Chromebook.

Audio, screen, and camera issues

Table 10. Audio, screen, and camera issues

Audio, screen, and camera issues

Issues Possible solutions

Audio issues

If you hear static, or the volume from the speakers is low when attempting to listen to audio: 1. Make sure the device is not muted. Try adjusting the

volume. 2. Try rebooting the Chromebook. 3. Try playing audio from various sources, including YouTube

and audio files stored locally on the Chromebook.

If the speakers are not responding when attempting to listen to audio:

1. Unplug the device from all cables (USB, headphones, and displays).

2. Try playing audio from various sources, including YouTube and audio files stored locally on the Chromebook.

3. Try rebooting the Chromebook. 4. If audio still does not respond, try to Reset or Recover the

Chomebook.

Screen issues

If the screen is not operating properly (images are too dark or no image is appearing): 1. Try adjusting the brightness with the brightness keys at

the top of the keyboard. 2. In the status area in the bottom-right of the screen, check

the display and make sure there are no issues with a mirrored or extended display.

3. Try rebooting the Chromebook 4. If the screen issues persist, try to Reset or Recover the

Chomebook.

48 Diagnostic and troubleshooting

Table 10. Audio, screen, and camera issues (continued)

Audio, screen, and camera issues

Camera issues

If the camera is not operating properly (blurry images or poor performance): 1. Check that the camera is not being blocked or covered by

a privacy screen or other obstruction. 2. Try using different apps that use the camera. Try a

Google+ Hangout or the onboard camera app 3. Try rebooting the Chromebook 4. If the camera issues persist, try to Reset or Recover the

Chomebook.

Bluetooth issue

Table 11. Bluetooth issue

Bluetooth issue

Issue Possible solutions

Bluetooth issues

If you run into issues while attempting to pair or use a Bluetooth device with the Chromebook, try the following steps to resolve the issue: 1. First, make sure that the Bluetooth device you are trying

to pair is supported by the Chromebook. 2. Try disabling and re-enabling Bluetooth connectivity from

the status area in the lower-right corner. 3. Try restarting the Chromebook. 4. If you are still encountering issue with bluetooth, try to

Reset or Recover the Chomebook.

Touchpad / Hotkeys issues

Table 12. Touchpad / hotkeys issues

Touchpad / Hotkeys issues

Issue Possible solutions

Touchpad not responding

If the touch pad has stopped responding, try the following steps to resolve the issue: Try moving the cursor after each step: 1. Tap the Esc key several times. 2. Drumroll the fingers across the touch pad for a few

seconds. 3. Restart the Chrome OS by holding down the power button

until the device turns off, and then turn it back on again. 4. If the cursor still does not move when using the touch pad,

try logging in from the Guest account using the tab key to navigate.

5. If users experience touch pad issues with the account that is not the owner (primary) account, delete the user account and re-create it. Again, use the tab key to navigate.

6. If none of the above steps work, try to Reset or Recover the Chomebook.

Top row of keys (Hotkeys) not responding If a hotkey (like the volume or brightness keys) are not responding, try the following troubleshooting steps, making sure to test the keys after each one:

Diagnostic and troubleshooting 49

Table 12. Touchpad / hotkeys issues (continued)

Touchpad / Hotkeys issues

1. If the affected key is volume or brightness, check to make sure you are not at the upper or lower limit for that setting.

2. If the backward or forward buttons do not work, check that the same icons in a web browser are not grayed out. For example, if the back button on a web page is grayed, this is because the browser is not aware of a page to move backward to.

3. Restart the Chrome OS by holding down the power button until the device turns off, and then turn it back on again.

4. Try using the keys in the Guest account. 5. If users experience hotkey issues with the account that is

not the owner (primary) account, delete the user account and re-create it.

6. If none of the above steps work, try to Reset or Recover the Chomebook.

Chrome OS issue

Table 13. Chrome OS issue

Chrome OS issues

Hes Dead, Jim! error message

If the Chromebook becomes slow or unresponsive, and the He's Dead, Jim! error message appears, the system could be running low on memory.

NOTE: If you terminated the process using Google Chrome's Task Manager, the system's task manager, or with a command line tool, this message will appear as well.

1. If the page was not ended intentionally, reload the page to continue. If the message continues to appear, try closing inactive tabs or other programs to free up more memory.

2. If issue persists, please see He's Dead, Jim! from Google knowledge base.

Chrome OS is missing or damaged

If the Chromebook does not start and displays the message, Chrome OS is missing or damaged. Please insert a recovery USB stick into the USB ports on the device:

Perform a system recovery. See performing Recover Chromebook for more information.

Chrome OS stops responding and nothing moves on the computer display

If the Chrome OS stops responding and nothing moves on the computer display: 1. Turn off the computer. 2. Disconnect all peripheral devices, and remove all USB

devices and media cards. 3. Disconnect the AC adapter. 4. Press and hold the power button for 10 seconds. 5. Reconnect the AC adapter, and turn on the system. 6. If issue persists, please perform a Reset or Recover the

Chromebook.

Lost / Forget Sign in password (Chrome OS) If you lost/forget the sign-in password to the Chromebook: 1. Check if this is a managed device (Enterprise enrolled

device).

50 Diagnostic and troubleshooting

Table 13. Chrome OS issue (continued)

Chrome OS issues

a. If this is a managed device, please contact the administrator to have them reset the password via Google Admin Console.

b. If this is not a managed device, please proceed with the following steps:

2. Sign in as guest or use a different PC. 3. Open an internet browser, and navigate to https://

www.google.com/accounts/recovery/ 4. Select I do not know my password, and then enter the

email address that you use to sign in to Google. 5. Click Continue and follow the on-screen instructions to

reset the password.

Other Chromebook lock up or freeze symptoms that are not listed here

If none of the above symptoms match the Chromebooks issue, refer to Google Help Center for the online troubleshooter and more help.

CROSH This topic covers the information you need to know for the Chrome Shell (CROSH). CROSH and the Google Chrome URL commands provide some troubleshooting tools, information, and advanced settings.

The Chrome OS does not support ePSA, Dell BIOS, the F12 boot menu, or DellConnect. There are no preboot diagnostics. All troubleshooting must be done inside the OS. Chrome Shell (CROSH) and the Chrome URL commands provide some troubleshooting tools, information, and advanced settings. CROSH is a command line interface similar to the Linux BASH or Windows command (cmd.exe) terminals. Chrome OS is based on Linux, but CROSH does not recognize most Linux commands. The most useful commands for troubleshooting are memory test, storage_test_1, storage_test_2, ping, and tracepath. Ping works differently than it does in Windows. By default, it repeats until you press + , and it does not show any statistics. The tracepath command is similar to the Windows traceroute command. A detailed explanation of the commands can be viewed below, by typing help, or help_advanced in CROSH.

1. Open the Chrome browser. 2. Press + + The interface appears as shown in the screenshot

below: 3. Type in the CROSH command for diagnostics. Type 'help' for a list of available commands. Type help_advanced to display

a complete list of commands for debugging purposes

Alternately, refer to CROSH Commands for the list of the CROSH commands available for diagnostics.

Diagnostic and troubleshooting 51

CROSH commands

The table below lists the available commands in Chrome Shell (CROSH).

Table 14. Help commands

Command Purpose

exit Exits the CROSH Shell.

help Displays this help.

help_advanced Displays the help for more advanced commands, used for debugging.

ping [-c count] [-i interval] [-n] [-s packetsize] [-W waittime] Sends ICMP ECHO_REQUEST packets to a network host. If is "gw", then the next hop gateway for the default route is used. It works just like the ping command on other operating systems. Press + to stop the ping process or halt any other command in CROSH.

ssh [optional args...] Starts the ssh subsystem if invoked without any arguments. "ssh ", "ssh ", "ssh< user>@ ". or "ssh @ " connect without entering the subsystem

ssh_forget_host Removes a host from the list of known ssh hosts. This command displays a menu of known hosts and prompts for the host to forget.

top Sets the chaps debug logging level. No arguments start verbose logging

Table 15. Advanced help command

Command Purpose

battery_test[ ] Tests the battery discharge rate for a given number of seconds. No argument defaults to a 300 s test.

bt_console [ ] Enters a Bluetooth debugging console. The Optional argument specifies the capability of a pairing agent the console provides; see the Bluetooth Core specification for valid options.

chaps_debug [start|stop| ] Sets the chaps debug logging level. No arguments will start verbose logging.

connectivity Shows connectivity status.

experimental_storage Enables or disables experimental storage features.

ff_debug [ ] [--help] [--list_valid_tags] [--reset] Adds and removes flimflam debugging tags.

memory_test Performs extensive memory testing on the available free memory.

modem [args...] Interacts with the 3G modem. Run modem help for detailed help.

modem_set_carrier carrier-name Configures the modem for the specified carrier.

network_diag[--date] [--link] [--show-macs] [--wifi] [-- help] [--wifi-mon]

Performs a suite of network diagnostics and saves a copy of the output to your download directory

network_logging Enables a predefined set of tags useful for debugging the specified device.

52 Diagnostic and troubleshooting

Table 15. Advanced help command (continued)

Command Purpose

p2p_update [enable | disable] Enables or disables the peer-to-peer (P2P) sharing of updates over the local network. This will both attempt to get updates from other peers in the network and shares the downloaded updates with them. Run this command without arguments to see the current state.

rlz < status | enable | disable> Enables or disables RLZ.

rollback Attempts to roll back to the previous update cached on your system. Only available on non-stable channels and non- enterprise enrolled devices. Please note that this will power wash your device.

route [-n] [-6] Displays the routing tables.

set_apn [-n ] [-u ] [-p ]

Sets the APN to use when connecting to the network specified by . If is not specified, use the network-id of the currently registered network.

set_apn - c Clears the APN to be used, so that the default APN is used instead.

set_arpgw Turns on the extra network state checking to make sure the default gateway is reachable.

set_cellular_ppp [-u ] [-p ] Sets the PPP username and/or password for an existing cellular connection. If neither -u nor -p is provided, this shows the existing PPP username for the cellular connection.

set_cellular_ppp -c Clears any existing PPP username and PPP password for an existing cellular connection.

sound Low level sound configuration. Can be used to play/record audio samples and enable beam forming on Pixel. sound beamforming will enable/disable the feature. sound record [duration] will start recording. sound play plays the recorded audio samples

storage_status Reads storage device SMART health status, vendor attributes, and error logs.

storage_test_1 Performs a short offline SMART test.

storage_test_2 Performs an extensive readability test.

syslog Logs a message to system log.

tpcontrol{status | taptoclick [on|off] sensitivity [1-5] | set < value>} tpcontrol {syntp [on|off]}

Allows the user to manually adjust advanced touchpad settings.

tracepath [-n] [/port] Traces the path/route to a network host.

update_over_cellular [enable|disable] Enables or disables the auto updates over cellular networks. Run without arguments to see the current state.

upload crashes Uploads available crash reports to the crash server.

wpa_debug [ ] [--help] [--list_valid_level] [-- reset]

Sets the wpa_supplicant debugging level.

xset m [acc_mult[/acc_div] [thr]] xset m default Tweaks the mouse acceleration rate.

xset r rate [delay [rate]] Tweaks the autorepeat rates. The delay is the number of milliseconds before autorepeat starts. The rate is the number of repeats per second.

xset r [keycode] < on|off > Turns autorepeat on/off. If a keycode is specified, it affects only that key. If not specified, it affects global behavior.

Diagnostic and troubleshooting 53

Chrome commands

Chrome:// pages contain experimental features, diagnostic tools, and detailed statistics. They are hidden in Chrome's user interface. Chrome://about page lists all Chrome's internal pages. To view all the commands, type chrome://about in the Chrome browser URL as shown below:

Table 16. Chrome browser shortcuts

Purpose Browser Shortcut Explanation

System Information chrome://system/ "Who am I".. BIOS version, and so on

Basic Connectivity Diags chrome://diagnostics/ Test for NIC and Internet connection

Chrome Information chrome://version More "Who am I" type of stuff

Create Recovery USB Stick chrome://imageburner/ Google's version of DBAR/DBRM

Chrome Flags chrome://flags Experimental features beyond the scope of what Dell supports

Memory Troubleshooting chrome://memory View running processes and memory utilization

Module Load chrome://conflicts Shows conflicts of all modules loaded by Chrome

Chrome Sync Status chrome://syncchrome://sync- internals

Allows troubleshooting of connected accounts

Connectivity Troubleshooting chrome://net-internals Comprehensive network/connectivity diagnostics, including DNS analysis, Waterfall and Bandwidth diagnostics, and so on

Histogram chrome://histograms Actual work and I/O audit

Credits chrome://credits References to all module/libs contributions and their respective wiki/ license URLs

Crash Reporting chrome://crashes Shows detailed crash report, if the feature was enabled

Apps RAM Utilization chrome://appcache-internals Detailed memory usage for apps/ extensions, especially handy for 2 GB Chromebooks

54 Diagnostic and troubleshooting

Following are the 12 most helpful chrome:// commands that you should know:

Table 17. Helpful chrome commands

Chrome Commands Purpose Screenshot

chrome://flags From here you can enable some of the experimental features that are hidden in the Google Chrome browser. Please note that as mentioned on this page, since these are experimental, these might not work as expected and might cause issues. Enable these features, and use it at your own risk.

chrome://dns This displays the list of hostnames for which the browser will prefetch the DNS records.

Diagnostic and troubleshooting 55

Table 17. Helpful chrome commands (continued)

Chrome Commands Purpose Screenshot

chrome://downloads This is also available from the Menu > Downloads. Shortcut key is Ctrl+J.

chrome://extensions This is also available from the Menu > Tools > Extensions.

chrome://bookmarks This is also available from the Menu > Bookmarks > Bookmark Manager. Short cut key is Ctrl+Shift+O.

56 Diagnostic and troubleshooting

Table 17. Helpful chrome commands (continued)

Chrome Commands Purpose Screenshot

chrome://history This is also available from the Menu > History. Short cut key is Ctrl+H.

chrome://memory This will redirect to chrome://memory- redirect/. This will display the memory used by the Google Chrome browser. This also displays all the process related to browser with their PID, process name, and the memory it takes.

chrome://net-internals This displays all networking related information. Use this to capture network events generated by the browser. You can also export this data. You can view DNS host resolver cache. One of the important features in this feature is Test. If a URL failed to load, you can go to chrome://net-internals > click on Tests tab > type that URL which failed, and click on Start Test, which does some test and report you why that URL failed. chrome://plugins/.

Diagnostic and troubleshooting 57

Table 17. Helpful chrome commands (continued)

Chrome Commands Purpose Screenshot

chrome://quota-internals This gives information about the disk space quote used by the browser, including the breakdown of how much space the individual websites took under temporary files.

chrome://sessions This displays the number of sessions and magic list that are currently running.

chrome://settings This is also available from the Menu > Options (on Windows), and Menu > Preferences (on Linux). From here you can control various browser related settings.

58 Diagnostic and troubleshooting

Table 17. Helpful chrome commands (continued)

Chrome Commands Purpose Screenshot

chrome://sync-internals This gives information about the Chrome sync feature, including the Sync URL used by Google, and sync statistics.

Commonly used CROSH command This page contains information about the most commonly used CROSH commands to diagnose the Dell Chromebook 11 (3189).

Below are some of the most commonly used CROSH commands to troubleshoot a hardware issue.

NOTE: CROSH storage_test_1 and storage_test_2 are not supported on the eMMC storage device.

Check battery charging status

The Chrome Shell (CROSH) includes a simple battery health diagnostic test. This is to confirm that the battery is charging and to check on the battery health and discharge rate. Follow the instruction provided to check on the battery charging status:

1. Connect the AC adapter to the Chromebook and a power outlet. 2. Turn on, and sign in to the Chromebook. 3. Open the Chrome browser. 4. Press CTRL + ALT + T to open CROSH.

Diagnostic and troubleshooting 59

5. Type battery_test 1 into CROSH, and then press Enter.

6. Check the result to confirm that the battery is charging.

Check battery health

Follow the steps to evaluate the health of the Chromebook battery, and check the discharge rate:

1. Disconnect the AC adapter from the Chromebook. 2. Turn on and sign in to Chromebook. 3. Open the Chrome browser.

60 Diagnostic and troubleshooting

4. Press CTRL + ALT + T to open CROSH.

5. Type battery_test 1 into CROSH, and then press Enter.

6. A screen displays the current battery health and discharge rate.

If the Battery health percentage is greater than 50%, the battery is within the expected wear limits. If the Battery health percentage is equal to or less than 50% and the battery is less than a year old, the battery is outside

expected wear limits and might need to be replaced. If the test results show that Battery is Unknown, the battery might need to be replaced.

Diagnostic and troubleshooting 61

Checking memory

Follow the steps below to perform a memory check for Chromebook:

NOTE: This will approximately take 20 minutes to complete the test, and it also depends on the capacity of the memory.

1. Turn on and sign in to Chromebook. 2. Open the Chrome browser. 3. Press CTRL + ALT + T to open CROSH.

4. Type memory_test into CROSH, and then press Enter.

62 Diagnostic and troubleshooting

5. A diagnostic screen displays the result of the memory test passed without any errors.

Example of a memory test failure.

Checking network status

If you are having trouble connecting to the Internet, use the steps in one or more of the following sections to test the network adapter:

Diagnostic and troubleshooting 63

Follow the instruction to gather the information about the network and diagnose the network errors.

1. Turn on and sign in to Chromebook. 2. Open the Chrome browser. 3. Press CTRL + ALT + T to open CROSH.

4. Type network_diag into CROSH, and then press Enter.

64 Diagnostic and troubleshooting

5. Wait while CROSH performs a set of network diagnostic tests. A diagnostic screen displays the results of the network adapter health test.

6. The diagnostic test log is saved as a.txt (plain text) file in the Files app.

Diagnostic and troubleshooting 65

7. If the diagnostic test returns a failure message, make sure the Wi-Fi adapter is enabled and connect to a network.

Reset Chromebook This page contains all information about resetting Dell Chromebook 11 (3189).

All local user data stored on the Chromebook can be cleared by resetting it to its original factory state (also known as Powerwash).

This step might be helpful if you want to reset owner permissions or if you are experiencing issues with your user profile.

NOTE: All data stored on your Chromebook such as downloaded files, photos, owner permissions, and saved networks, will

be deleted for all accounts when performing a factory reset. After clearing this data, you will be guided through the initial

setup again. Resetting your device will not affect your accounts themselves, or any data synced to these accounts.

NOTE: Do not follow the instructions below if you're using a managed Chrome device, as you will not be able to re-enroll

your device after powerwashing it.

Follow these steps to reset your Chromebook to its original factory state:

1. Click the status area in the lower-right corner, where your account picture appears.

66 Diagnostic and troubleshooting

2. Click Settings as highlighted from the screenshot below.

3. Click Show advanced settings to expand the menu.

Diagnostic and troubleshooting 67

4. Click the Powerwash button.

5. Click Restart when prompted.

You can also reset your Chromebook from the sign-in screen by holding down the keys Ctrl+Alt+Shift+R and clicking Restart. (If you are signed in to your Chromebook, sign out first before you press on Ctrl+Alt+Shift+R, then click Restart. Once the Chromebook is restarted, click Reset.)

After you restart the Chromebook, you should now see the setup screen. Follow the instructions on the screen to set up your Chromebook again. Make sure you sign in with your primary Google Account, because this account is set as the owner account.

68 Diagnostic and troubleshooting

Recovery Chromebook This page contains information about recovering Dell Chromebook 11 (3189).

Recovering the Chromebook

Install a new version of the Chrome operating system on your Chromebook by going through the recovery process. You may want to go through this process if you are having problems updating your Chromebook or if it stops working.

NOTE: All account information and data stored on your Chromebook, such as photos, downloaded files, and saved

networks, will be deleted. Owner privileges for your primary account will also be reset. However, the actual Google

Accounts and any data synced to these accounts are not affected by the recovery process. After the recovery process is

complete, you will be guided through the initial setup again.

Prerequisites:

Before starting this process, you need the following:

A Chrome device, Windows, Mac, or the Linux computer with administrative rights. A 4 GB or larger USB flash drive or SD card that you do not mind clearing.

Step 1: Check for the "Chrome OS is missing or damaged" message

If you see this message, you can first try to perform a hard reset on your Chromebook by pressing Refresh + Power. If you still see this message after performing a hard reset, please proceed to Step 2.

If you see the Chrome OS verification is turned off message, refer to Chrome OS verification is turned off section below.

Step 2: Create the recovery USB flash drive or SD card

Insert a USB flash drive or SD card into your computer and follow the instructions below:

Table 18. USB flash drive or SD card

Operating System Instructions

Chrome Device Instructions

Create a recovery flash drive by using the Image Burner. The tool may not be available in all languages. 1. Type chrome://imageburner into the omnibox (browser's

address bar) . 2. Run the tool and follow the instructions that appear on

your screen.

NOTE: When recovering your Chromebook, make sure to create the recovery flash drive on the same model.

Windows Instructions

1. Click this link to download the Recovery Tool. If you are a network administrator for your school, business, or organization, click this link to download the Recovery Tool: 2. 3.

2. Run the tool and follow the instructions that appear on your screen.

3. After you recover your Chromebook, you must format your USB flash drive or SD card using the Recovery Tool. If you do not format your USB flash drive or SD card, you will not be able to use all the storage space on your external device. Additionally, your USB flash drive or SD card may not be recognizable by Windows.

Mac Instructions Create a recovery flash drive by using the Recovery Tool. The tool may not be available in all languages. 1. Click this link to download the Recovery Tool.

Diagnostic and troubleshooting 69

Table 18. USB flash drive or SD card (continued)

Operating System Instructions

2. Run the tool and follow the instructions that appear on your screen.

After the process is complete, you might see an alert saying your USB drive or SD card is unreadable. If this fails, try removing and reinserting your USB drive or SD card. Your USB drive or SD card should now be ready to use for recovery.

Linux Instructions

Create a recovery flash drive by using the Recovery Tool. The tool may not be available in all languages. 1. 1.Click this link to download the Recovery Tool. 2. Modify the script permissions to allow execution with

the following command: $ & sudo chmod 755 linux_recovery.sh

3. Run the script with root privileges with the following command:$ sudo bash linux_recovery.sh

4. Follow the prompts from the tool to complete building the operating system image.

Reinstall the Chrome Operating System

1. Start your Chromebook. 2. When the Chrome OS is missing or damaged screen appears, insert the USB flash drive or SD card you created into the

USB port or SD card slot on your Chrome device 3. Wait for the Chromebook to boot up from the flash drive 4. Follow the instructions that appear on the screen. 5. On successful installation of the Chrome operating system, you will be prompted to remove the USB flash drive or SD card. 6. Remove the USB flash drive or SD card when prompted, and your Chromebook will automatically restart.

You should now be able to start your Chromebook as normal. Because the data stored on your Chromebook has been cleared, you will need to go through the initial setup again. Make sure you sign in with your primary Google Account, because this account will be set as the owner account.

"Chrome OS verification is turned off" Message

By default, Chromebooks are set to the normal user mode. If you've set the user mode to developer mode instead, you'll see a screen with the message "Chrome OS verification is turned off" when you start up. Use the developer mode if you want to test your own version of the Chrome operating system.

Press Ctrl+D to enter developer mode. If you press the space bar instead, you'll see a screen asking to recover your device.

Troubleshooting Tips

Table 19. Troubleshooting tips

Question Solution

I am unable to recover my Chromebook To help ensure that you are running the latest version of Chrome OS once you recover your Chromebook, we recommend creating the recovery media with the latest version of Chrome OS and avoid using recovery media that may contain an older version of the operating system.

An error message An unexpected error has occurred. Try the following steps: 1. Confirm that you successfully completed all instructions

exactly as specified in Step 2: Create the recovery USB flash drive or SD card above.

2. Try using a different USB stick or SD card.

70 Diagnostic and troubleshooting

Table 19. Troubleshooting tips (continued)

Question Solution

3. If the problem persists, contact Google Chrome support team.

An error message You are using an out-of-date Chrome OS recovery image.

You should download an up-to date recovery image. Simply follow all the instructions exactly as specified in Step 2 above.

You successfully recovered your Chromebook but now you can not use your USB or SD card with Windows

After you have completed recovery, you need to format your USB or SD card using the recovery tool.

You successfully recovered your Chromebook but now Windows does not recognize the whole size of the USB or SD card used for recover.

After you have completed recovery, you need to format your USB or SD card using the recovery tool.

Diagnostic and troubleshooting 71

Contacting Dell Prerequisites

NOTE: If you do not have an active Internet connection, you can find contact information on your purchase invoice, packing

slip, bill, or Dell product catalog.

About this task

Dell provides several online and telephone-based support and service options. Availability varies by country and product, and some services may not be a

Manualsnet FAQs

If you want to find out how the Chromebook Dell works, you can view and download the Dell Chromebook 11 3189 Laptop Disassembly Guide on the Manualsnet website.

Yes, we have the Disassembly Guide for Dell Chromebook as well as other Dell manuals. All you need to do is to use our search bar and find the user manual that you are looking for.

The Disassembly Guide should include all the details that are needed to use a Dell Chromebook. Full manuals and user guide PDFs can be downloaded from Manualsnet.com.

The best way to navigate the Dell Chromebook 11 3189 Laptop Disassembly Guide is by checking the Table of Contents at the top of the page where available. This allows you to navigate a manual by jumping to the section you are looking for.

This Dell Chromebook 11 3189 Laptop Disassembly Guide consists of sections like Table of Contents, to name a few. For easier navigation, use the Table of Contents in the upper left corner.

You can download Dell Chromebook 11 3189 Laptop Disassembly Guide free of charge simply by clicking the “download” button in the upper right corner of any manuals page. This feature allows you to download any manual in a couple of seconds and is generally in PDF format. You can also save a manual for later by adding it to your saved documents in the user profile.

To be able to print Dell Chromebook 11 3189 Laptop Disassembly Guide, simply download the document to your computer. Once downloaded, open the PDF file and print the Dell Chromebook 11 3189 Laptop Disassembly Guide as you would any other document. This can usually be achieved by clicking on “File” and then “Print” from the menu bar.