Table of Contents
- Dell Chromebook 3400 Service Manual
- Working on your computer
- Technology and components
- Removing and Installing
- Troubleshooting
- Getting help
DELL 3400 User Manual
Displayed below is the user manual for 3400 by DELL which is a product in the Notebooks category. This manual has pages.
Related Manuals
Dell Chromebook 3400
Service Manual
Regulatory Model: P101G
Regulatory Type: P101G001
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.
© 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.
2019 - 03
Rev. A00
Contents
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
2 Technology and components..........................................................................................................................7
USB features.......................................................................................................................................................................7
USB 3.0/USB 3.1 Gen 1 (SuperSpeed USB)............................................................................................................. 7
Speed.............................................................................................................................................................................8
Applications...................................................................................................................................................................8
Compatibility................................................................................................................................................................. 9
Keyboard............................................................................................................................................................................. 9
Keyboard keys function............................................................................................................................................... 9
Touchpad........................................................................................................................................................................... 10
Bluetooth............................................................................................................................................................................ 11
3 Removing and Installing................................................................................................................................13
microSD card.....................................................................................................................................................................13
Removing microSD card............................................................................................................................................ 13
Installing microSD card...............................................................................................................................................13
Base cover.........................................................................................................................................................................14
Removing the base cover..........................................................................................................................................14
Installing the base cover.............................................................................................................................................17
Battery............................................................................................................................................................................... 19
Lithium-ion battery precautions................................................................................................................................19
Removing the battery................................................................................................................................................20
Installing the battery..................................................................................................................................................22
Speaker............................................................................................................................................................................. 25
Removing the speakers.............................................................................................................................................25
Installing the speakers............................................................................................................................................... 28
Input Output board...........................................................................................................................................................31
Removing the Input and output board..................................................................................................................... 31
Installing Input output board.....................................................................................................................................34
Keyboard interposer board..............................................................................................................................................37
Removing the keyboard interposer board............................................................................................................... 37
Installing the keyboard interposer board................................................................................................................. 39
Keyboard............................................................................................................................................................................41
Removing the keyboard............................................................................................................................................. 41
Installing the keyboard...............................................................................................................................................43
System board................................................................................................................................................................... 45
Removing the system board.....................................................................................................................................45
Installing system board..............................................................................................................................................50
Contents 3
Display assembly.............................................................................................................................................................. 55
Removing display assembly...................................................................................................................................... 55
Installing display assembly.........................................................................................................................................58
Display bezel......................................................................................................................................................................61
Removing display bezel..............................................................................................................................................61
Installing display bezel................................................................................................................................................64
Display panel.....................................................................................................................................................................66
Removing display panel.............................................................................................................................................66
Installing display panel............................................................................................................................................... 68
Display hinges................................................................................................................................................................... 70
Removing display hinge.............................................................................................................................................70
Installing display hinge................................................................................................................................................ 71
Display cable..................................................................................................................................................................... 72
Removing display cable............................................................................................................................................. 72
Installing display cable................................................................................................................................................73
Camera.............................................................................................................................................................................. 74
Removing camera.......................................................................................................................................................74
Installing camera.........................................................................................................................................................75
Display back cover........................................................................................................................................................... 76
Replacing display back cover and antenna assembly............................................................................................ 76
Palm rest........................................................................................................................................................................... 78
Replacing palmrest assembly....................................................................................................................................78
4 Troubleshooting........................................................................................................................................... 80
Basic troubleshooting......................................................................................................................................................80
Power issues...............................................................................................................................................................80
CROSH..............................................................................................................................................................................84
CROSH commands......................................................................................................................................................... 85
Chrome commands......................................................................................................................................................... 86
Commonly used CROSH command.............................................................................................................................. 92
Check battery charging status.................................................................................................................................92
Reset Chromebook..........................................................................................................................................................99
Recovery Chromebook.................................................................................................................................................. 104
Recovering the Chromebook..................................................................................................................................104
5 Getting help............................................................................................................................................... 108
Contacting Dell............................................................................................................................................................... 108
4Contents
Working on your computer
Safety instructions
Prerequisite
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.
About this task
WARNING: Disconnect all power sources before opening the computer cover or panels. After you nish working inside the
computer, replace all covers, panels, and screws before connecting to the power source.
WARNING: 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
CAUTION: Many repairs may only be done by a certied 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 at the same time as touching 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 dierently 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 o.
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
Working on your computer 5
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
About this task
To avoid damaging your computer, perform the following steps before you begin working inside the computer.
Steps
1 Ensure that you follow the Safety Instruction.
2 Ensure that your work surface is at and clean to prevent the computer cover from being scratched.
3 Turn o your computer.
4 Disconnect all network cables from the computer.
CAUTION: To disconnect a network cable, rst unplug the cable from your computer and then unplug the cable from
the network device.
5 Disconnect your computer and all attached devices from their electrical outlets.
6 Press and hold the power button while the computer is unplugged to ground the system board.
NOTE: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically touching an
unpainted metal surface at the same time as touching a connector on the back of the computer.
After working inside your computer
About this task
After you complete any replacement procedure, ensure that you connect any external devices, cards, and cables before turning on your
computer.
Steps
1 Connect any telephone or network cables to your computer.
CAUTION: To connect a network cable, rst plug the cable into the network device and then plug it into the
computer.
2 Connect your computer and all attached devices to their electrical outlets.
3 Turn on your computer.
4 If required, verify that the computer works correctly by running ePSA diagnostics.
6Working on your computer
Technology and components
NOTE: Instructions provided in this section are applicable on computers shipped with Windows 10 operating system. Windows 10
is factory-installed with this computer.
Topics:
• USB features
• Keyboard
• Touchpad
• Bluetooth
USB features
Universal Serial Bus, or USB, was introduced in 1996. It dramatically simplied the connection between host computers and peripheral
devices like mice, keyboards, external drivers, and printers.
Let's take a quick look on the USB evolution referencing to the table below.
Table 1. USB evolution
Type Data Transfer Rate Category Introduction Year
USB 2.0 480 Mbps High Speed 2000
USB 3.0/USB 3.1 Gen 1 5 Gbps Super Speed 2010
USB 3.1 Gen 2 10 Gbps Super Speed 2013
USB 3.0/USB 3.1 Gen 1 (SuperSpeed USB)
For years, the USB 2.0 has been rmly entrenched as the de facto interface standard in the PC world with about 6 billion devices sold, and
yet the need for more speed grows by ever faster computing hardware and ever greater bandwidth demands. The USB 3.0/USB 3.1 Gen 1
nally has the answer to the consumers' demands with a theoretically 10 times faster than its predecessor. In a nutshell, USB 3.1 Gen 1
features are as follows:
• Higher transfer rates (up to 5 Gbps)
• Increased maximum bus power and increased device current draw to better accommodate power-hungry devices
• New power management features
• Full-duplex data transfers and support for new transfer types
• Backward USB 2.0 compatibility
• New connectors and cable
The topics below cover some of the most commonly asked questions regarding USB 3.0/USB 3.1 Gen 1.
2
Technology and components 7
Speed
Currently, there are 3 speed modes dened by the latest USB 3.0/USB 3.1 Gen 1 specication. They are Super-Speed, Hi-Speed and Full-
Speed. The new SuperSpeed mode has a transfer rate of 4.8Gbps. While the specication retains Hi-Speed, and Full-Speed USB mode,
commonly known as USB 2.0 and 1.1 respectively, the slower modes still operate at 480Mbps and 12Mbps respectively and are kept to
maintain backward compatibility.
USB 3.0/USB 3.1 Gen 1 achieves the much higher performance by the technical changes below:
• An additional physical bus that is added in parallel with the existing USB 2.0 bus (refer to the picture below).
• USB 2.0 previously had four wires (power, ground, and a pair for dierential data); USB 3.0/USB 3.1 Gen 1 adds four more for two pairs
of dierential signals (receive and transmit) for a combined total of eight connections in the connectors and cabling.
• USB 3.0/USB 3.1 Gen 1 utilizes the bidirectional data interface, rather than USB 2.0's half-duplex arrangement. This gives a 10-fold
increase in theoretical bandwidth.
With today's ever increasing demands placed on data transfers with high-denition video content, terabyte storage devices, high megapixel
count digital cameras etc., USB 2.0 may not be fast enough. Furthermore, no USB 2.0 connection could ever come close to the 480Mbps
theoretical maximum throughput, making data transfer at around 320Mbps (40MB/s) — the actual real-world maximum. Similarly, USB
3.0/USB 3.1 Gen 1 connections will never achieve 4.8Gbps. We will likely see a real-world maximum rate of 400MB/s with overheads. At this
speed, USB 3.0/USB 3.1 Gen 1 is a 10x improvement over USB 2.0.
Applications
USB 3.0/USB 3.1 Gen 1 opens up the laneways and provides more headroom for devices to deliver a better overall experience. Where USB
video was barely tolerable previously (both from a maximum resolution, latency, and video compression perspective), it's easy to imagine
that with 5-10 times the bandwidth available, USB video solutions should work that much better. Single-link DVI requires almost 2Gbps
throughput. Where 480Mbps was limiting, 5Gbps is more than promising. With its promised 4.8Gbps speed, the standard will nd its way
into some products that previously weren't USB territory, like external RAID storage systems.
Listed below are some of the available SuperSpeed USB 3.0/USB 3.1 Gen 1 products:
• External Desktop USB 3.0/USB 3.1 Gen 1 Hard Drives
• Portable USB 3.0/USB 3.1 Gen 1 Hard Drives
• USB 3.0/USB 3.1 Gen 1 Drive Docks & Adapters
• USB 3.0/USB 3.1 Gen 1 Flash Drives & Readers
• USB 3.0/USB 3.1 Gen 1 Solid-state Drives
8Technology and components
• USB 3.0/USB 3.1 Gen 1 RAIDs
• Optical Media Drives
• Multimedia Devices
• Networking
• USB 3.0/USB 3.1 Gen 1 Adapter Cards & Hubs
Compatibility
The good news is that USB 3.0/USB 3.1 Gen 1 has been carefully planned from the start to peacefully co-exist with USB 2.0. First of all,
while USB 3.0/USB 3.1 Gen 1 species new physical connections and thus new cables to take advantage of the higher speed capability of
the new protocol, the connector itself remains the same rectangular shape with the four USB 2.0 contacts in the exact same location as
before. Five new connections to carry receive and transmitted data independently are present on USB 3.0/USB 3.1 Gen 1 cables and only
come into contact when connected to a proper SuperSpeed USB connection.
Windows 10 will be bringing native support for USB 3.1 Gen 1 controllers. This is in contrast to previous versions of Windows, which
continue to require separate drivers for USB 3.0/USB 3.1 Gen 1 controllers.
Keyboard
Dell keyboards have a few extra features to help you browse the web eortlessly and eciently. 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 2. 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
Enter Overview mode, which shows all windows
Decrease screen brightness
Technology and components 9
Special keys
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 3. 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
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.
Touchpad
This page contains information for Dell touchpad gestures.
The following table lists some gestures and actions supported by the Chromebook touchpad:
10 Technology and components
Table 4. Touch pad gestures
Touchpad gestures
Gestures Explanation
Simply move your nger 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 ngers.
Place two ngers 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 ngers 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 ngers to quickly move between tabs.
Swipe Quickly move two ngers left or right to go backward or forward on web pages or while using apps.
Click the item you want to move with one nger. With a second nger, move the item. Release both ngers to
drop the item at its new location.
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,
rst 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
Technology and components 11
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)
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 conrm 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 rst 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.
12 Technology and components
Removing and Installing
microSD card
Removing microSD card
Prerequisite
Follow the procedure in before working inside your computer.
Steps
1 Press the microSD card to release it from the computer [1].
2 Remove the microSD card from the computer [2].
Installing microSD card
Step
Slide the SD card into its slot until it clicks into place [1, 2].
3
Removing and Installing 13
Next step
Follow the procedure in after working inside your computer.
Base cover
Removing the base cover
Prerequisites
1 Follow the procedure in before working inside your computer.
2 Remove the microSD card.
Steps
1 Loosen the 11 captive screws that secure the base cover to the computer.
14 Removing and Installing
2 Pry the base cover from the edge using a plastic scribe [1, 2].
Removing and Installing 15
NOTE: While removing the base cover, on-site technicians must take care to remove the base cover carefully. There are
prying recess points next to the left and right hinges which ease the disassembly procedure. With the help of a plastic
scribe, pry open from the top left side of the base cover, continue working your way around the left and right side of the
base cover, then remove the base cover from the system.
3 Lift the base cover from the computer.
16 Removing and Installing
Installing the base cover
Steps
1 Align the base cover on the computer and press the edges of the cover until it clicks into place.
Removing and Installing 17
2 Tighten the 11 captive screws to secure the base cover to the computer.
18 Removing and Installing
Next steps
1 Install the microSD card.
2 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.
• 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, the entire system should be replaced. Contact https://www.dell.com/support for
assistance and further instructions.
• Always purchase genuine batteries from https://www.dell.com or authorized Dell partners and re-sellers.
Removing and Installing 19
Removing the battery
Prerequisites
1 Follow the procedure in before working inside your computer
2 Remove the microSD card.
3 Remove the base cover.
Steps
1 Disconnect the battery cable from the connector in the system board [1].
2 Unroute the battery cable from the routing channel [2].
3 Remove the three (M2.0x4.0) screws that secure the battery to the palmrest [1].
4 Peel the adhesive tape that secures the battery in place [2, 3].
20 Removing and Installing
5 Pry the battery from the bottom edge [1] and remove the battery from the computer [2].
Removing and Installing 21
Installing the battery
Steps
1 Peel the protective lm before installing the battery [1].
2 Align the battery into the slot on the computer and press the battery on the upper right corner to x it to the palmrest [2].
22 Removing and Installing
3 Replace the three (M2.0x4.0) screws to secure the battery to the palmrest [1].
4 Ax the adhesive tape to the battery [2, 3].
Removing and Installing 23
5 Reroute the battery cable and connect the cable to the connector on the system board [1, 2].
24 Removing and Installing
Next steps
1 Install the base cover.
2 Install the microSD card.
3 Follow the procedure in after working inside your computer.
Speaker
Removing the speakers
Prerequisites
1 Follow the procedure in before working inside your computer.
2 Remove the microSD card.
3 Remove the base cover.
4 Remove the battery.
Steps
1 Peel the adhesive tape that secures the speaker cable to the palmrest [1].
2 Disconnect the speaker cable from the connector on the system board [2].
3 Peel the adhesive tape that secures the speaker cable to the palmrest [3].
Removing and Installing 25
4 Unroute the cable from retention clips in the routing channel.
26 Removing and Installing
5 Lift the speakers away from the computer.
Removing and Installing 27
Installing the speakers
Steps
1 Place the speakers into the slots on the computer.
28 Removing and Installing
2 Reroute the speaker cable through the retention clips in the routing channel.
Removing and Installing 29
3 Connect the speaker cable to the connector on the system board [1].
4 Ax the adhesive tapes to secure the speaker cable to the computer [2, 3].
30 Removing and Installing
Next steps
1 Install the battery.
2 Install the base cover.
3 Install the microSD card.
4 Follow the procedure in after working inside your computer.
Input Output board
Removing the Input and output board
Prerequisites
1 Follow the procedure in before working inside your computer.
2 Remove the microSD card.
3 Remove the base cover.
4 Remove the battery.
Steps
1 Disconnect the Type-C power cable from the connector in the IO board [1].
2 Open the latch and disconnect the 30-pin and 40-pin IO board cable from the connectors in the IO board [2].
Removing and Installing 31
3 Remove the two (M2.0x4.0) screws that secure the IO board bracket to the IO board [1].
4 Use a plastic scribe to lift the IO board bracket away from the palmrest [2].
32 Removing and Installing
5 Remove the two (M2.0x4.0) screws that secure the IO board to the palmrest [1].
6 Lift the IO board away from the computer [2].
Removing and Installing 33
Installing Input output board
Steps
1 Place the IO board to its slot in the computer [1].
2 Replace the two (M2.0x4.0) screws that secure the I/O board to the palmrest [2].
34 Removing and Installing
3 Place the IO board bracket to its slot and replace the two (M2.0x4.0) screws that secure the bracket to the IO board [1, 2].
Removing and Installing 35
4 Connect the Type-C power cable to the connector on the IO board [1].
5 Connect the 30-pin and 40-pin IO board cables and close the latch to secure it to the IO board [2].
36 Removing and Installing
Next steps
1 Install the battery.
2 Install the base cover.
3 Install the microSD card.
4 Follow the procedure in after working inside your computer.
Keyboard interposer board
Removing the keyboard interposer board
Prerequisites
1 Follow the procedure in before working inside your computer.
2 Remove the microSD card.
3 Remove the base cover.
4 Remove the battery.
Steps
1 Disconnect the keyboard cable from the connector on the keyboard interposer board [1].
2 Disconnect the keyboard interposer cable from the connector on the system board [2].
Removing and Installing 37
3 Remove the two (M2.0x4.0) screws that secure the keyboard interposer board to the palmrest [1].
4 Lift the keyboard interposer board away from the computer [2].
38 Removing and Installing
Installing the keyboard interposer board
Steps
1 Carefully insert the keyboard interposer board to its slot [1].
2 Replace the two (M2.0x4.0) screws to secure the keyboard interposer board to the palmrest [2].
Removing and Installing 39
3 Connect the keyboard cable and keyboard interposer board cable to the connectors on the interposer board and system board [1, 2].
40 Removing and Installing
Next steps
1 Install the battery.
2 Install the base cover.
3 Install the microSD card.
4 Follow the procedure in after working inside your computer.
Keyboard
Removing the keyboard
Prerequisites
1 Follow the procedure in before working inside your computer.
2 Remove the microSD card.
3 Remove the base cover.
4 Remove the battery.
Steps
1 Disconnect the keyboard cable from the connector on the keyboard interposer board [1].
2 Use a plastic scribe to release the keyboard from the two release holes in the system [2].
3 Push the keyboard cable through the gap in the palmrest [3].
NOTE: The two release holes for the keyboard are indicated by the "KB" labeling.
Removing and Installing 41
4 Turn the system and carefully pull the keyboard cable through the gap in the palm rest.
5 Lift and pull the keyboard out from the computer [1, 2].
42 Removing and Installing
Installing the keyboard
Steps
1 Align the keyboard trim with the tabs on the system, and slightly lift it [1, 2].
2 Carefully insert the keyboard cable through the gap on the palm rest and place the keyboard trim to its place [1, 2].
Removing and Installing 43
3 Press the keyboard until it clicks into place and then turn the system [1, 2].
44 Removing and Installing
4 Pull the keyboard cable from the gap in the palmrest and connect to the connector on the keyboard interposer board [1, 2].
Next steps
1 Install the battery.
2 Install the base cover.
3 Install the microSD card.
4 Follow the procedure in after working inside your computer.
System board
Removing the system board
Prerequisites
1 Follow the procedure in before working inside your computer.
2 Remove the microSD card.
3 Remove the base cover.
4 Remove the battery.
Steps
1 Remove the single (M2.0x3.0) screw that secures the wireless bracket to the system board [1].
2 Lift the wireless bracket away from the computer [2].
3 Disconnect the two wireless antennas from the connector on the system board [3].
Removing and Installing 45
4 Remove the single (M2.0x4.0) screw that secures the display cable bracket to the system board [1].
5 Lift the display cable bracket away from the computer [2].
6 Peel the adhesive tape that secures the display cable [3].
7 Lift the latch and disconnect the display cable from the connector on the system board [4].
46 Removing and Installing
8 Remove the left IO bracket from the system board [1].
9 Disconnect and peel the Type-C power cable from the connector on the system board [2].
Removing and Installing 47
10 Lift the latch and disconnect the 30-pin IO board cable, 40-pin IO board cable, and the touchpad cable from the connectors on the
system board [1, 2].
11 Disconnect the speaker cable from the connector on the system board [3].
48 Removing and Installing
12 Remove the four (M2.0x4.0) screws that secure the system board to the palmrest [1].
13 Carefully slide and lift the system board from the left side and remove the system board from the computer [2].
Removing and Installing 49
Installing system board
Steps
1 Align the screw holes on the system board with the screw holes and slide the system board on the computer.
2 Replace the four (M2.0x4.0) screws to secure the system board to the palmrest.
50 Removing and Installing
3 Connect the 30-pin IO board cable, 40-pin IO board cable, and the touchpad cable to the connectors on the system board and close
the latch [1, 2].
4 Connect the speaker cable to the connector on the system board [3].
Removing and Installing 51
5 Place the left IO bracket to its place on the system board [1].
6 Connect the Type-C power cable to the connector on the system board [2].
52 Removing and Installing
7 Connect the display cable to the connector on the system board and close the latch [1].
8 Ax the adhesive tape to secure the display cable to the system board [2].
9 Place the display cable bracket over the connector and replace the single (M2.0x4.0) screw to secure the display cable bracket to the
system board [3, 4].
Removing and Installing 53
10 Connect the two wireless antennas to the connector on the system board [1].
11 Align and place the wireless bracket to its slot [2].
12 Replace the single (M2.0x3.0) screw to secure the wireless bracket [3].
54 Removing and Installing
Next steps
1 Install the battery.
2 Install the base cover.
3 Install the microSD card.
4 Follow the procedure in after working inside your computer.
Display assembly
Removing display assembly
Prerequisites
1 Follow the procedure in before working inside your computer.
2 Remove the microSD card.
3 Remove the base cover.
4 Remove the battery.
Steps
1 Remove the single (M2.0x3.0) screw that secures the wireless bracket to the system board [1].
2 Lift the wireless bracket away from the computer [2].
3 Disconnect and unroute the two wireless antennas from the connector on the system board [3].
Removing and Installing 55
4 Remove the single (M2.0x4.0) screw that secures the display cable bracket to the system board [1].
5 Lift the display cable bracket away from the computer [2].
6 Peel the adhesive tape that secures the display cable [3].
7 Lift the latch and disconnect the display cable from the connector on the system board [4].
56 Removing and Installing
NOTE: The screw securing the display cable bracket also secures the left IO bracket to the system board, as a result
removal of the display cable bracket leaves the left IO bracket unsecured. Technicians should therefore ensure that the
left IO bracket is not moved or lost during any subsequent disassembly processes.
8 Open the system to 180 degrees and place the computer on a at surface, with the display hinges facing up.
9 Remove the six (M2.5x5.0) screws that secure the display assembly to the palmrest [1].
10 Remove the display assembly from the plamrest [2].
Removing and Installing 57
Installing display assembly
Steps
1 Place the chassis on the edge of a plane surface.
2 Align the display assembly with the screw holders on the computer [1].
3 Replace the six (M2.5x5.0) display hinge bracket screws to secure the display assembly to the palmrest [2].
58 Removing and Installing
4 Lift the system and close the display.
5 Connect the display cable to the connector on the system board and close the latch [1].
6 Ax the adhesive tape to secure the display cable to the system board [2].
7 Place the display cable bracket over the connector and replace the single (M2.0x4.0) screw to secure the display cable bracket to the
system board [3, 4].
Removing and Installing 59
8 Connect the two wireless antennas to the connector on the system board [1].
9 Align and place the wireless bracket to its slot [2].
10 Replace the single (M2.0x3.0) screw to secure the wireless bracket [3].
60 Removing and Installing
Next steps
1 Install the battery.
2 Install the base cover.
3 Install the microSD card.
4 Follow the procedure in after working inside your computer.
Display bezel
Removing display bezel
Prerequisites
1 Follow the procedure in before working inside your computer.
2 Remove the microSD card.
3 Remove the base cover.
4 Remove the battery.
5 Remove the display assembly
Steps
1 Remove the four (M2.5x3.5) screws that secure the display bezel to the panel.
NOTE: The stickers covering the display bezel screws can be removed along with the screws and do not need to be
peeled o rst. When removing, apply pressure with a screwdriver on top of the sticker and rotate to remove both the
sticker and the display bezel screw together.
Removing and Installing 61
2 Use a plastic scribe to carefully pry open the upper right or upper left corner of the outside edge of the display bezel and continue to
pry open the outside edge of the top side of the display bezel and then pry open the outside edge of the left and right sides of the
display bezel [1, 2, 3].
62 Removing and Installing
3 Carefully pry open the inside edge of the top side of the display bezel and then pry open the inside edge of the left and right sides of
the display bezel [1, 2].
4 Continue to pry open the bottom outside edge of the display bezel and carefully pry open the bottom inside edge of the display bezel
[3,4].
NOTE: Be careful when prying the display bezel as peeling the adhesive on display bezel may damage the display panel.
Removing and Installing 63
Installing display bezel
Steps
1 Place the display bezel on the display assembly.
2 Starting from the top corner, press on the display bezel and work around the entire bezel until it clicks on to the display assembly.
64 Removing and Installing
3 Replace the four (M2.5x3.5) screws to secure the display bezel to the display assembly.
4 Adhere the four bezel stickers over the screws once the screws have been secured.
NOTE: A new set of bezel stickers are included with any replacement display bezel. When replacing the new display
bezel, adhere the new caps over the screws once the screws have been secured.
Removing and Installing 65
Next steps
1 Install the display assembly.
2 Install the battery.
3 Install the base cover.
4 Install the microSD card.
5 Follow the procedure in after working inside your computer.
Display panel
Removing display panel
Prerequisites
1 Follow the procedure in before working inside your computer.
2 Remove the microSD card.
3 Remove the base cover.
4 Remove the battery.
5 Remove the display assembly.
6 Remove the display bezel
66 Removing and Installing
Steps
1 Remove the four (M2.0x3.0) screws that secure the display panel to the display assembly [1] and lift to turn the display panel to
access the display cable [2].
2 Peel the conductive tape securing the display cable on the back of the display panel 1].
3 Peel and remove the rubber spacer covering the display cable [2].
4 Lift the latch and disconnect the display cable from the connector on the display panel [3, 4].
5 Remove the display panel away from the display assembly [5].
Removing and Installing 67
Installing display panel
Steps
1 Align and place the display panel [1].
2 Connect the display cable to the connector on the display panel and close the latch [2, 3].
3 Ax the rubber spacer [4] and then the conductive tape to secure the display cable on the back of the display panel [5].
4 Flip the display panel to align with the screw holders on the display assembly [6].
68 Removing and Installing
5 Replace the four (M2.0x3.0) screws to secure the display panel to the display assembly.
Removing and Installing 69
Next steps
1 Install the display bezel.
2 Install the display assembly.
3 Install the battery.
4 Install the base cover.
5 Install the microSD card.
6 Follow the procedure in after working inside your computer.
Display hinges
Removing display hinge
Prerequisites
1 Follow the procedure in before working inside your computer.
2 Remove the microSD card.
3 Remove the base cover.
4 Remove the battery.
5 Remove the display assembly.
6 Remove the display bezel.
7 Remove the display panel.
70 Removing and Installing
Steps
1 Remove the four (M2.5x3.5) screws that secure the display hinges to the display back cover [1].
2 Lift the display hinges away from the display back cover [2].
Installing display hinge
Steps
1 Place the display hinges onto its slot and align the screw holes on the hinges with the screws holes on the display back cover [1].
2 Replace the four (M2.5x3.5) screws to secure the display hinges to the display back cover [2].
Removing and Installing 71
Next steps
1 Install the display panel.
2 Install the display bezel.
3 Install the display assembly.
4 Install the battery.
5 Install the base cover.
6 Install the microSD card.
7 Follow the procedure in after working inside your computer.
Display cable
Removing display cable
Prerequisites
1 Follow the procedure in before working inside your computer.
2 Remove the microSD card.
3 Remove the base cover.
4 Remove the battery.
5 Remove the display assembly.
6 Remove the display bezel.
72 Removing and Installing
7 Remove the display panel.
Steps
1 Peel the adhesive tape that covers the camera cable connector [1].
2 Disconnect the camera cable from the camera module and unroute the cable [2, 3].
3 Peel the adhesive tape that secures the display cable and lift the display cable away from the display back cover and antenna
assembly.
Installing display cable
Steps
1 Ax the adhesive tape to secure the display cable to the display back coverand route the cable [1].
2 Connect the camera cable connector to the camera module [2].
3 Ax the adhesive tape to secure the camera cable connector [3].
Removing and Installing 73
Next steps
1 Install the display panel.
2 Install the display bezel.
3 Install the display assembly.
4 Install the battery.
5 Install the base cover.
6 Install the microSD card.
7 Follow the procedure in after working inside your computer.
Camera
Removing camera
Prerequisites
1 Follow the procedure in before working inside your computer.
2 Remove the microSD card.
3 Remove the base cover.
4 Remove the battery.
5 Remove the display assembly.
6 Remove the display bezel.
74 Removing and Installing
Steps
1 Peel the adhesive tape that covers the camera cable connector [1].
2 Disconnect the camera cable from the connector [2].
3 Use a plastic scribe to pull the camera module out from the chassis [3].
Installing camera
Steps
1 Align and place the camera to its slot in the display assembly [1].
2 Connect the camera cable to the connector on the display assembly [2].
3 Ax the adhesive tape to secure the camera cable connector [3].
Removing and Installing 75
Next steps
1 Install the display bezel.
2 Install the display assembly.
3 Install the battery.
4 Install the base cover.
5 Install the microSD card.
6 Follow the procedure in after working inside your computer.
Display back cover
Replacing display back cover and antenna assembly
Prerequisites
1 Follow the procedure in before working inside your computer.
2 Remove the microSD card.
3 Remove the base cover.
4 Remove the battery.
5 Remove the display assembly.
6 Remove the display bezel.
7 Remove the display panel.
8 Remove the display hinges.
9 Remove the display cable.
10 Remove the camera.
76 Removing and Installing
Step
The component you are left with is the display back-cover and antenna assembly after performing the pre-removal parts procedures.
NOTE: The display back-cover and antenna assembly cannot be further disassembled once all the pre-removal parts
procedures are completed. If the wireless antennas are malfunctioning and need to be replaced, replace the entire
display back-cover and antenna assembly.
Next steps
1 Install the display cable.
2 Install the camera.
3 Install the display hinges.
4 Install the display panel
5 Install the display bezel.
6 Install the display assembly.
7 Install the battery.
8 Install the base cover.
9 Install the microSD card.
10 Follow the procedure in after working inside your computer.
Removing and Installing 77
Palm rest
Replacing palmrest assembly
Prerequisites
1 Follow the procedure in before working inside your computer.
2 Remove the microSD card.
3 Remove the base cover.
4 Remove the battery.
5 Remove the speakers.
6 Remove the keyboard interposer board.
7 Remove the keyboard.
8 Remove the IO board.
9 Remove the display assembly.
10 Remove the system board.
Step
The component you are left with is the palmrest.
NOTE: The palmrest assembly cannot be further disassembled once all of the pre-removal parts procedures are
completed. If the touchpad frame, touchpad support bracket, touchpad mylar, touchpad module, touchpad cable,
conductive tape or thermal pad are malfunctioning and need to be replaced, replace the entire palm-rest assembly.
78 Removing and Installing
Next steps
1 Install the system board.
2 Install the display assembly.
3 Install the IO board.
4 Install the keyboard.
5 Install the keyboard interposer board.
6 Install the speakers.
7 Install the battery.
8 Install the base cover.
9 Install the microSD card.
10 Follow the procedure in after working inside your computer.
Removing and Installing 79
Troubleshooting
Basic troubleshooting
This page contains all the information for Dell 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 5. 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 gure 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
rst time, the battery is still in shipping mode.
To resolve this issue, turn o 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 dierent AC adapter with the same power voltage.
5 Remove the AC adapter, and turn on with the battery power
only.
4
80 Troubleshooting
Display issue
Table 6. 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 o, then turn it back on again.
3 Reset or Recover the Chromebook.
Audio, screen, and camera issues
Table 7. 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 les 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 les 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.
Troubleshooting 81
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 dierent 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 8. 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 and Hotkeys issues
Table 9. Touchpad and 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 ngers across the touch pad for a few seconds.
3 Restart the Chrome OS by holding down the power button
until the device turns o, 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.
82 Troubleshooting
Touchpad / Hotkeys issues
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:
1 If the aected 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 o, 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 10. Chrome OS issue
Chrome OS issues
He’s 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 o 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:
Troubleshooting 83
Chrome OS issues
1 Check if this is a managed device (Enterprise enrolled device).
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 dierent 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 Chromebook’s 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 dierently than it does in Windows. By
default, it repeats until you press <Ctrl> + <C>, 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 <Clrl> + <Alt> + <T> 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.
84 Troubleshooting
CROSH commands
The table below lists the available commands in Chrome Shell (CROSH).
Table 11. 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 <Clrt> + <C>
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 <user> <host>", "ssh <user> <host> <port>", "ssh<
user>@<host>". or "ssh <user>@<host> <port>" 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 12. Advanced help command
Command Purpose
battery_test[<test length>] Tests the battery discharge rate for a given number of seconds. No
argument defaults to a 300 s test.
bt_console [<agent capability>] Enters a Bluetooth debugging console. The Optional argument
species the capability of a pairing agent the console provides; see
the Bluetooth Core specication for valid options.
chaps_debug [start|stop|<log_level>] Sets the chaps debug logging level. No arguments will start verbose
logging.
connectivity Shows connectivity status.
experimental_storage<status|enable|disable> Enables or disables experimental storage features.
_debug [<tag_expr>] [--help] [--list_valid_tags] [--reset] Adds and removes imam debugging tags.
memory_test Performs extensive memory testing on the available free memory.
modem <command> [args...] Interacts with the 3G modem. Run modem help for detailed help.
modem_set_carrier carrier-name Congures the modem for the specied carrier.
network_diag[--date] [--link] [--show-macs] [--wi] [--help] [--wi-
mon] <host>
Performs a suite of network diagnostics and saves a copy of the
output to your download directory
network_logging <wi|cellular|ethernet> Enables a predened set of tags useful for debugging the specied
device.
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
Troubleshooting 85
Command Purpose
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 <network-id>] [-u <username>] [-p <password>] <apn> Sets the APN to use when connecting to the network specied by
<network-id>. If <network-id> is not specied, 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 <true | false> Turns on the extra network state checking to make sure the default
gateway is reachable.
set_cellular_ppp [-u <username>] [-p <password>] 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 <command> <argument> Low level sound conguration. Can be used to play/record audio
samples and enable beam forming on Pixel. sound beamforming
<on|o > will enable/disable the feature. sound record [duration]
will start recording. sound play <lename> plays the recorded audio
samples
storage_status Reads storage device SMART health status, vendor attributes, and
error logs.
storage_test_1 Performs a short oine SMART test.
storage_test_2 Performs an extensive readability test.
syslog <message> Logs a message to system log.
tpcontrol{status | taptoclick [on|o] sensitivity [1-5] | set
<property>< value>} tpcontrol {syntp [on|o]}
Allows the user to manually adjust advanced touchpad settings.
tracepath [-n] <destination>[/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 [<debug_level>] [--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|o > Turns autorepeat on/o. If a keycode is specied, it aects only
that key. If not specied, it aects global behavior.
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:
86 Troubleshooting
Table 13. 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 stu
Create Recovery USB Stick chrome://imageburner/ Google's version of DBAR/DBRM
Chrome Flags chrome://ags Experimental features beyond the scope of
what Dell supports
Memory Troubleshooting chrome://memory View running processes and memory
utilization
Module Load chrome://conicts Shows conicts 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
Following are the 12 most helpful chrome:// commands that you should know:
Troubleshooting 87
Table 14. Helpful chrome commands
Chrome Commands Purpose Screenshot
chrome://ags 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.
88 Troubleshooting
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.
Troubleshooting 89
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/.
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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
les.
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.
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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 .
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 conrm 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.
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5 Type battery_test 1 into CROSH, and then press Enter.
6 Check the result to conrm 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.
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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.
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• If the test results show that Battery is Unknown, the battery might need to be replaced.
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.
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5 A diagnostic screen displays the result of the memory test passed without any errors.
Example of a memory test failure.
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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:
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.
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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) le in the Files app.
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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 .
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 prole.
NOTE: All data stored on your Chromebook such as downloaded les, 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 aect 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:
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1 Click the status area in the lower-right corner, where your account picture appears.
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2 Click Settings as highlighted from the screenshot below.
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3 Click Show advanced settings to expand the menu.
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4 Click the Powerwash button.
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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 rst 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.
Recovery Chromebook
This page contains information about recovering Dell .
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.
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NOTE: All account information and data stored on your Chromebook, such as photos, downloaded les, 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 aected 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 ash 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 rst 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 verication is turned o message, refer to Chrome OS verication is turned o section below.
Step 2- Create the recovery USB ash drive or SD card
Insert a USB ash drive or SD card into your computer and follow the instructions below
Table 15. USB ash drive or SD card
Operating System Instructions
Chrome Device Instructions
Create a recovery ash 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 ash 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 ash drive or SD card using the Recovery Tool. If you do
not format your USB ash drive or SD card, you will not be
able to use all the storage space on your external device.
Additionally, your USB ash drive or SD card may not be
recognizable by Windows.
Mac Instructions
Create a recovery ash drive by using the Recovery Tool. The tool
may not be available in all languages.
1 Click this link to download the Recovery Tool.
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
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Operating System Instructions
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 ash 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 ash 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 ash 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 ash drive or SD card.
6 Remove the USB ash 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 verication is turned o 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 verication is turned o" 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 16. 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:
1Conrm that you successfully completed all instructions
exactly as specied in Step 2: Create the recovery USB ash
drive or SD card above.
2 Try using a dierent USB stick or SD card.
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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 specied 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.
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Getting help
Contacting Dell
Prerequisite
NOTE: If you do not have an active Internet connection, you can nd 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 available in your area. To contact Dell for sales, technical support, or customer service issues:
Steps
1 Go to Dell.com/support.
2 Select your support category.
3 Verify your country or region in the Choose a Country/Region drop-down list at the bottom of the page.
4 Select the appropriate service or support link based on your need.
5
108 Getting help