Table of Contents
- Dell Latitude 5400 Chrome Service Manual
- Contents
- Major components of your system
- Working on your computer
- Removing and installing components
- Recommended tools
- Screw List
- Disassembly and reassembly
- MicroSD card
- Base cover
- Battery
- WLAN card
- WWAN card
- Coin-cell battery
- Memory modules
- DC-in port
- Solid-state drive
- Solid state drive bracket
- Inner frame
- Touchpad buttons
- LED board
- Speakers
- Heatsink assembly
- System fan
- System board
- Keyboard
- Keyboard bracket
- Power button
- Display assembly
- Display bezel
- Display panel
- Camera
- Hinge caps
- Display hinges
- Display (eDP) cable
- Display back cover assembly
- Palmrest assembly
- Troubleshooting
- Getting help and contacting Dell
DELL 5400 User Manual
Displayed below is the user manual for 5400 by DELL which is a product in the Notebooks category. This manual has pages.
Related Manuals
Dell Latitude 5400 Chrome
Service Manual
Regulatory Model: P98G
Regulatory Type: P98G005
April 2021
Rev. A02
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.
© 2020 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: Major components of your system ............................................................................... 5
Chapter 2: Working on your computer........................................................................................... 7
Safety instructions.............................................................................................................................................................. 7
Before working inside your computer....................................................................................................................... 7
Safety precautions........................................................................................................................................................ 8
Electrostatic discharge—ESD protection............................................................................................................... 8
ESD field service kit ..................................................................................................................................................... 9
Transporting sensitive components.........................................................................................................................10
After working inside your computer........................................................................................................................ 10
Chapter 3: Removing and installing components...........................................................................11
Recommended tools...........................................................................................................................................................11
Screw List.............................................................................................................................................................................11
Disassembly and reassembly .......................................................................................................................................... 12
MicroSD card.................................................................................................................................................................12
Base cover..................................................................................................................................................................... 14
Battery........................................................................................................................................................................... 20
WLAN card....................................................................................................................................................................24
WWAN card.................................................................................................................................................................. 26
Coin-cell battery.......................................................................................................................................................... 28
Memory modules......................................................................................................................................................... 30
DC-in port......................................................................................................................................................................32
Solid-state drive...........................................................................................................................................................36
Solid state drive bracket............................................................................................................................................38
Inner frame....................................................................................................................................................................40
Touchpad buttons....................................................................................................................................................... 44
LED board......................................................................................................................................................................48
Speakers........................................................................................................................................................................ 52
Heatsink assembly.......................................................................................................................................................58
System fan.................................................................................................................................................................... 60
System board............................................................................................................................................................... 64
Keyboard........................................................................................................................................................................70
Keyboard bracket.........................................................................................................................................................74
Power button................................................................................................................................................................75
Display assembly.......................................................................................................................................................... 77
Display bezel................................................................................................................................................................. 83
Display panel................................................................................................................................................................. 87
Camera............................................................................................................................................................................91
Hinge caps.....................................................................................................................................................................93
Display hinges...............................................................................................................................................................95
Display (eDP) cable.....................................................................................................................................................97
Display back cover assembly.................................................................................................................................... 99
Palmrest assembly......................................................................................................................................................101
Contents
Contents 3
Chapter 4: Troubleshooting....................................................................................................... 103
Basic troubleshooting..................................................................................................................................................... 103
Power issues............................................................................................................................................................... 103
CROSH............................................................................................................................................................................... 107
CROSH commands....................................................................................................................................................108
Chrome commands.................................................................................................................................................... 110
Commonly used CROSH command........................................................................................................................ 115
Recovery Chromebook................................................................................................................................................... 122
Recovering the Chromebook.................................................................................................................................. 122
Reset Chromebook..........................................................................................................................................................124
LCD Built-in Self Test (BIST)....................................................................................................................................... 128
LED Indicators and Characteristics............................................................................................................................. 129
Battery charge and status LED .............................................................................................................................129
Diagnostic LEDs............................................................................................................................................................... 129
M-BIST............................................................................................................................................................................... 130
Diagnostics........................................................................................................................................................................ 130
Validation Tools ......................................................................................................................................................... 135
Chapter 5: Getting help and contacting Dell...............................................................................142
4Contents
Major components of your system
This section illustrates the major components of your system and their locations.
1. Base cover
2. DC-in port
3. Heatsink assembly
4. System fan
5. Memory modules
6. System board
7. Battery
8. Inner frame
9. Speakers
10. Solid state drive
11. Touchpad buttons
12. Display assembly
13. LED board
14. Palmrest assembly
15. WLAN card
16. WWAN card
1
Major components of your system 5
17. Coin-cell battery
NOTE: Dell provides a list of components and their part numbers for the original system configuration purchased. These
parts are available according to warranty coverages purchased by the customer. Contact your Dell sales representative for
purchase options.
6 Major components of your system
Working on your computer
Topics:
•Safety instructions
Safety instructions
Prerequisites
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: 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 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 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: 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: The color of your computer and certain components may appear differently than shown in this document.
Before working inside your computer
Steps
1. Save and close all open files and exit all open applications.
2. Shut down your computer. Click Start > Power > Shut down.
NOTE: If you are using a different operating system, see the documentation of your operating system for shut-down
instructions.
2
Working on your computer 7
3. Disconnect your computer and all attached devices from their electrical outlets.
4. Disconnect all attached network devices and peripherals, such as keyboard, mouse, and monitor from your computer.
5. Remove any media card and optical disc from your computer, if applicable.
6. After the computer is unplugged, press and hold the power button for 5 seconds to ground the system board.
CAUTION: Place the computer on a flat, soft, and clean surface to avoid scratches on the display.
7. Place the computer face down.
Safety precautions
The safety precautions chapter details the primary steps to be taken before performing any disassembly instructions.
Observe the following safety precautions before you perform any installation or break/fix procedures involving disassembly or
reassembly:
●Turn off the system and all attached peripherals.
●Disconnect the system and all attached peripherals from AC power.
●Disconnect all network cables, telephone, and telecommunications lines from the system.
●Use an ESD field service kit when working inside any notebook to avoid electrostatic discharge (ESD) damage.
●After removing any system component, carefully place the removed component on an anti-static mat.
●Wear shoes with non-conductive rubber soles to reduce the chance of getting electrocuted.
Standby power
Dell products with standby power must be unplugged before you open the case. Systems that incorporate standby power are
essentially powered while turned off. The internal power enables the system to be remotely turned on (wake on LAN) and
suspended into a sleep mode and has other advanced power management features.
Unplugging, pressing and holding the power button for 20 seconds should discharge residual power in the system board.
Remove the battery from notebooks.
Bonding
Bonding is a method for connecting two or more grounding conductors to the same electrical potential. This is done through
the use of a field service electrostatic discharge (ESD) kit. When connecting a bonding wire, ensure that it is connected to bare
metal and never to a painted or non-metal surface. The wrist strap should be secure and in full contact with your skin, and
ensure that you remove all jewelry such as watches, bracelets, or rings prior to bonding yourself and the equipment.
Electrostatic discharge—ESD protection
ESD is a major concern when you handle electronic components, especially sensitive components such as expansion cards,
processors, memory DIMMs, and system boards. Very slight charges can damage circuits in ways that may not be obvious, such
as intermittent problems or a shortened product life span. As the industry pushes for lower power requirements and increased
density, ESD protection is an increasing concern.
Due to the increased density of semiconductors used in recent Dell products, the sensitivity to static damage is now higher than
in previous Dell products. For this reason, some previously approved methods of handling parts are no longer applicable.
Two recognized types of ESD damage are catastrophic and intermittent failures.
●Catastrophic – Catastrophic failures represent approximately 20 percent of ESD-related failures. The damage causes
an immediate and complete loss of device functionality. An example of catastrophic failure is a memory DIMM that has
received a static shock and immediately generates a "No POST/No Video" symptom with a beep code emitted for missing or
nonfunctional memory.
●Intermittent – Intermittent failures represent approximately 80 percent of ESD-related failures. The high rate of
intermittent failures means that most of the time when damage occurs, it is not immediately recognizable. The DIMM
receives a static shock, but the tracing is merely weakened and does not immediately produce outward symptoms related to
the damage. The weakened trace may take weeks or months to melt, and in the meantime may cause degradation of memory
integrity, intermittent memory errors, etc.
8Working on your computer
The more difficult type of damage to recognize and troubleshoot is the intermittent (also called latent or "walking wounded")
failure.
Perform the following steps to prevent ESD damage:
●Use a wired ESD wrist strap that is properly grounded. The use of wireless anti-static straps is no longer allowed; they do not
provide adequate protection. Touching the chassis before handling parts does not ensure adequate ESD protection on parts
with increased sensitivity to ESD damage.
●Handle all static-sensitive components in a static-safe area. If possible, use anti-static floor pads and workbench pads.
●When unpacking a static-sensitive component from its shipping carton, do not remove the component from the anti-static
packing material until you are ready to install the component. Before unwrapping the anti-static packaging, ensure that you
discharge static electricity from your body.
●Before transporting a static-sensitive component, place it in an anti-static container or packaging.
ESD field service kit
The unmonitored Field Service kit is the most commonly used service kit. Each Field Service kit includes three main components:
anti-static mat, wrist strap, and bonding wire.
Components of an ESD field service kit
The components of an ESD field service kit are:
●Anti-Static Mat – The anti-static mat is dissipative and parts can be placed on it during service procedures. When using an
anti-static mat, your wrist strap should be snug and the bonding wire should be connected to the mat and to any bare metal
on the system being worked on. Once deployed properly, service parts can be removed from the ESD bag and placed directly
on the mat. ESD-sensitive items are safe in your hand, on the ESD mat, in the system, or inside a bag.
●Wrist Strap and Bonding Wire – The wrist strap and bonding wire can be either directly connected between your wrist
and bare metal on the hardware if the ESD mat is not required, or connected to the anti-static mat to protect hardware that
is temporarily placed on the mat. The physical connection of the wrist strap and bonding wire between your skin, the ESD
mat, and the hardware is known as bonding. Use only Field Service kits with a wrist strap, mat, and bonding wire. Never
use wireless wrist straps. Always be aware that the internal wires of a wrist strap are prone to damage from normal wear
and tear, and must be checked regularly with a wrist strap tester in order to avoid accidental ESD hardware damage. It is
recommended to test the wrist strap and bonding wire at least once per week.
●ESD Wrist Strap Tester – The wires inside of an ESD strap are prone to damage over time. When using an unmonitored
kit, it is a best practice to regularly test the strap prior to each service call, and at a minimum, test once per week. A
wrist strap tester is the best method for doing this test. If you do not have your own wrist strap tester, check with your
regional office to find out if they have one. To perform the test, plug the wrist-strap's bonding-wire into the tester while it is
strapped to your wrist and push the button to test. A green LED is lit if the test is successful; a red LED is lit and an alarm
sounds if the test fails.
●Insulator Elements – It is critical to keep ESD sensitive devices, such as plastic heat sink casings, away from internal parts
that are insulators and often highly charged.
●Working Environment – Before deploying the ESD Field Service kit, assess the situation at the customer location. For
example, deploying the kit for a server environment is different than for a desktop or portable environment. Servers are
typically installed in a rack within a data center; desktops or portables are typically placed on office desks or cubicles. Always
look for a large open flat work area that is free of clutter and large enough to deploy the ESD kit with additional space to
accommodate the type of system that is being repaired. The workspace should also be free of insulators that can cause an
ESD event. On the work area, insulators such as Styrofoam and other plastics should always be moved at least 12 inches or
30 centimeters away from sensitive parts before physically handling any hardware components
●ESD Packaging – All ESD-sensitive devices must be shipped and received in static-safe packaging. Metal, static-shielded
bags are preferred. However, you should always return the damaged part using the same ESD bag and packaging that the
new part arrived in. The ESD bag should be folded over and taped shut and all the same foam packing material should be
used in the original box that the new part arrived in. ESD-sensitive devices should be removed from packaging only at an
ESD-protected work surface, and parts should never be placed on top of the ESD bag because only the inside of the bag is
shielded. Always place parts in your hand, on the ESD mat, in the system, or inside an anti-static bag.
●Transporting Sensitive Components – When transporting ESD sensitive components such as replacement parts or parts
to be returned to Dell, it is critical to place these parts in anti-static bags for safe transport.
Working on your computer 9
ESD protection summary
It is recommended that all field service technicians use the traditional wired ESD grounding wrist strap and protective anti-static
mat at all times when servicing Dell products. In addition, it is critical that technicians keep sensitive parts separate from all
insulator parts while performing service and that they use anti-static bags for transporting sensitive components.
Transporting sensitive components
When transporting ESD sensitive components such as replacement parts or parts to be returned to Dell, it is critical to place
these parts in anti-static bags for safe transport.
Lifting equipment
Adhere to the following guidelines when lifting heavy weight equipment:
CAUTION: Do not lift greater than 50 pounds. Always obtain additional resources or use a mechanical lifting
device.
1. Get a firm balanced footing. Keep your feet apart for a stable base, and point your toes out.
2. Tighten stomach muscles. Abdominal muscles support your spine when you lift, offsetting the force of the load.
3. Lift with your legs, not your back.
4. Keep the load close. The closer it is to your spine, the less force it exerts on your back.
5. Keep your back upright, whether lifting or setting down the load. Do not add the weight of your body to the load. Avoid
twisting your body and back.
6. Follow the same techniques in reverse to set the load down.
After working inside your computer
About this task
NOTE: Leaving stray or loose screws inside your computer may severely damage your computer.
Steps
1. Replace all screws and ensure that no stray screws remain inside your computer.
2. Connect any external devices, peripherals, or cables you removed before working on your computer.
3. Replace any media cards, discs, or any other parts that you removed before working on your computer.
4. Connect your computer and all attached devices to their electrical outlets.
5. Turn on your computer.
10 Working on your computer
Removing and installing components
NOTE: The images in this document may differ from your computer depending on the configuration you ordered.
Topics:
•Recommended tools
•Screw List
•Disassembly and reassembly
Recommended tools
The procedures in this document require the following tools:
●Phillips #0 screwdriver
●Phillips #1 screwdriver
●Plastic scribe: Recommended for field technicians.
NOTE: The #0 screw driver is for screws 0-1 and the #1 screw driver is for screws 2-4.
Screw List
This table shows the screw list and the images for the Dell Latitude 5300 2-in-1 Chrome , for different components.
Table 1. Screw Size List
Component Screw type Quantity Image
Base cover M2.5x6.5 (captive screws)
NOTE: Screws are part of
the base cover.
8
Battery M2x5 (captive screws) 2
WWAN M2x3 1
WLAN M2x2 1
SSD support bracket M2x3 2
SSD M2x2 (big head) 1
3
Removing and installing components 11
Table 1. Screw Size List
Component Screw type Quantity Image
LED board M2x2.5 (big head) 1
Fan M2x5 2
eDP bracket M2x4 1
Display assembly M2.5x4 4
Touchpad button board M2x3 2
Power adapter port bracket M2x4 2
Memory module frame M2x3 3
System board M2.5x4 2
Keyboard support bracket M2x2 19
Keyboard M2x2 5
Disassembly and reassembly
NOTE: The images in this document may differ from your computer depending on the configuration you ordered.
MicroSD card
Removing the microSD card
Prerequisites
1. Follow the procedure in Before working inside your computer.
Steps
1. Push the microSD card to release it from the computer [1].
2. Slide the microSD card out of the computer [2].
12 Removing and installing components
Installing the microSD card
Steps
1. Align the microSD card to its slot on the computer [1].
2. Slide the microSD card into the slot until it clicks into place [2].
Removing and installing components 13
2. Using a plastic scribe [1], pry the base cover from the top-left corner and continue to work on the sides to open the base
cover [2].
Removing and installing components 15
3. Lift and remove the base cover away from the computer.
16 Removing and installing components
Installing the base cover
Steps
1. Align and place the base cover on the computer.
Removing and installing components 17
2. Press the edges and sides of the base cover until it snaps into place.
18 Removing and installing components
3. Tighten the eight captive screws to secure the base cover to the computer.
Removing and installing components 19
Next steps
1. Install the microSD card.
2. Follow the procedure in After working on your computer.
Battery
Lithium-ion battery precautions
CAUTION:
●Exercise caution when handling Lithium-ion batteries.
●Discharge the battery completely before removing it. Disconnect the AC power adapter from the system and
operate the computer solely on battery power—the battery is fully discharged when the computer no longer
turns on when the power button is pressed.
●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.
●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.
20 Removing and installing components
Removing the battery
Prerequisites
1. Follow the procedure in before working with your computer.
2. Remove the microSD card.
3. Remove the base cover.
Steps
1. Peel the adhesive tape that secures the battery cable connector [1].
2. Disconnect the battery cable from the connector on the system board.
3. Loosen the single captive screw that secures the battery to the palmrest [1]. Slide the battery inward and lift the battery
away from the palmrest.
Removing and installing components 21
Installing the battery
Steps
1. Align and slide the battery on the palmrest [1].
2. Tighten the single captive screw to secure the battery to the palmrest [2].
22 Removing and installing components
3. Connect the battery cable to the connector on the system board .
Removing and installing components 23
Next steps
1. Install the base cover.
2. Install the microSD card.
3. Follow the procedure in After working on your computer.
WLAN card
Removing the WLAN card
Prerequisites
1. Follow the procedure in before working with your computer.
2. Remove the microSD card.
3. Remove the base cover.
4. Disconnect the battery.
Steps
1. Remove the single (M2x3)(M2x3) screw that secures the WLAN card bracket to the system board [1].
2. Remove the WLAN card bracket that secures the WLAN antenna cables [2].
3. Disconnect the WLAN antenna cables from the connectors on the WLAN card [3].
4. Slide and lift the WLAN card away from the connector on the system board [4].
24 Removing and installing components
Remove
WLAN card
Installing the WLAN card
About this task
CAUTION: To avoid damage to the WLAN card, do not place any cables under it.
Steps
1. Insert the WLAN card into the connector on the system board [1].
2. Connect the WLAN antenna cables to the connectors on the WLAN card [2].
3. Place the WLAN card bracket to secure the WLAN antenna cables to the WLAN card [3].
4. Replace the single (M2x3) screw to secure the WLAN card bracket to the WLAN card [4].
Removing and installing components 25
Next steps
1. Connect the battery.
2. Install the base cover.
3. Install the microSD card.
4. Follow the procedure in After working on your computer.
WWAN card
Removing the WWAN card
Prerequisites
1. Follow the procedure in before working with your computer.
2. Remove the microSD card.
3. Remove the base cover.
4. Disconnect the battery.
Steps
1. Remove the single (M2x3) screw that secures the WWAN card bracket to the system board [1].
2. Remove the WWAN card bracket that secures the WWAN antenna cables [2].
3. Disconnect the WWAN antenna cables from the connectors on the WWAN card [3].
4. Slide and lift the WWAN card away from the connector on the system board [4].
26 Removing and installing components
Installing the WWAN card
About this task
CAUTION: To avoid damage to the WWAN card, do not place any cables under it.
Steps
1. Insert the WWAN card into the connector on the system board [1].
2. Connect the WWAN antenna cables to the connectors on the WWAN card [2].
3. Place the WWAN card bracket to secure the WWAN antenna cables to the WWAN card [3].
4. Replace the single (M2x3) screw to secure the WWAN card bracket to the WWAN card [4].
Removing and installing components 27
Next steps
1. Connect the battery.
2. Install the base cover.
3. Install the microSD card.
4. Follow the procedure in After working on your computer.
Coin-cell battery
Removing the coin-cell battery
Prerequisites
1. Follow the procedure in before working with your computer.
2. Remove the microSD card.
3. Remove the base cover.
4. Disconnect the battery.
5. Remove the WWAN.
6. Remove the WLAN.
7. Remove the memory module.
8. Remove the DC-in port.
Steps
1. Turn the system board and disconnect the coin cell battery cable from the connector on the system board.
2. Disconnect the coin cell battery cable from the connector on the system board [1].
28 Removing and installing components
3. Lift the coin cell battery from the system board [2].
Installing the coin-cell battery
Steps
1. Turn the system board and connect the coin cell battery cable to the connector on the system board.
2. Place the coin cell on the system board [1].
3. Connect the coin cell battery cable to the connector on the system board [2].
Removing and installing components 29
Next steps
1. Install the DC-in.
2. Install the memory module.
3. Install the WLAN.
4. Install the WWAN.
5. Connect the battery.
6. Install the base cover.
7. Install the microSD card.
8. Follow the procedure in After working on your computer.
Memory modules
Removing the memory module
Prerequisites
1. Follow the procedure in before working with your computer.
2. Remove the microSD card.
3. Remove the base cover.
4. Disconnect the battery.
Steps
1. Pry the retention clips securing the memory module until the memory module pops-up [1].
2. Remove the memory module from the memory module slot [2].
30 Removing and installing components
Installing the memory module
Steps
1. Align the notch on the memory module with the tab on the memory-module slot.
2. Slide the memory module firmly into the slot at an angle [1].
3. Press the memory module down until the clips secure it [2].
NOTE: If you do not hear the click, remove the memory module and reinstall it.
Removing and installing components 31
Next steps
1. Connect the battery.
2. Install the base cover.
3. Install the microSD card.
4. Follow the procedure in After working on your computer.
DC-in port
Removing the DC-in port
Prerequisites
1. Follow the procedure in before working with your computer.
2. Remove the microSD card.
3. Remove the base cover.
4. Remove the battery.
Steps
1. Remove the two (M2x4) and (M2x5) screws that secure the Type-C bracket to the system board [1]. Lift the Type-C
bracket away from the computer [2].
32 Removing and installing components
2. Disconnect the DC-in port cable from the connector on the system board and remove the DC-in port from the computer [1,
2].
Removing and installing components 33
Installing the DC-in port
Steps
1. Place the DC-in port to its slot on the computer [1].
2. Connect the DC-in port cable to the connector on the system board [2].
34 Removing and installing components
3. Place the Type-C bracket on its slot on the computer [1].
4. Replace the two (M2x4) and (M2x5) screws to secure the Type-C bracket to the palmrest [2].
Removing and installing components 35
Next steps
1. Install the battery.
2. Install the base cover.
3. Install the microSD card.
4. Follow the procedure in After working on your computer.
Solid-state drive
Removing the M.2 SSD
Prerequisites
1. Follow the procedure in before working with your computer.
2. Remove the microSD card.
3. Remove the base cover.
4. Dsiconnect the battery.
Steps
1. Remove the two (M2x3) screws that secures the SSD to the palmrest [1].
2. Slightly turn and remove the SSD support bracket from the M.2 SSD slot [2]. Remove the single (M2x2) screw that secures
the M.2 SSD to the palmrest [1].
36 Removing and installing components
3. Lift the M.2 SSD away from the computer and remove the SSD of the SSD thermal plate
Installing the M.2 SSD
Steps
1. Place the M.2 SSD into the slot on the palmrest [1].
2. Align and place the SSD support bracket above the M.2 SSD [2].
3. Replace the two (M2x3) screws to secure the SSD support bracket to the palmrest [3].
Removing and installing components 37
Next steps
1. Connect the battery.
2. Install the base cover.
3. Install the microSD card.
4. Follow the procedure in After working on your computer.
Solid state drive bracket
Removing the solid state drive bracket
Prerequisites
1. Follow the procedure in before working with your computer.
2. Remove the microSD card.
3. Remove the base cover.
4. Remove the battery.
Steps
1. Remove the single (M2x3) screw that secures the bracket to the palmrest [1].
2. Lift the SSD bracket of the slot on the palmrest [2].
38 Removing and installing components
Installing the solid state drive bracket
Steps
1. Align the bracket and insert it into the slot on the palmrest [1].
2. Replace the single (M2x3) screw to secure the bracket to the palmrest [2].
Removing and installing components 39
Next steps
1. Install the battery.
2. Install the base cover.
3. Install the microSD card.
4. Follow the procedure in After working on your computer.
Inner frame
Removing the inner frame
Prerequisites
1. Follow the procedure in before working with your computer.
2. Remove the microSD card.
3. Remove the base cover.
4. Remove the battery.
5. Remove the WWAN.
6. Remove the WLAN.
7. Remove the memory module.
8. Remove the DC-in port.
9. Remove the Coin cell battery.
Steps
1. Unroute the WLAN antenna cables.
40 Removing and installing components
2. Remove the four five (M2x5) screws that secure the inner frame to the system board [1].
3. Remove the six (M2x3) screws that secure the inner frame to the system chassis [2].
4. Lift the inner frame away from the system chassis [3].
Removing and installing components 41
Installing the inner frame
Steps
1. Align and place the inner frame on the system chassis [1].
2. Replace the six (M2x3) screws to secure the inner frame to the system chassis [2].
3. Replace the three (M2x5) screws to secure the inner frame to the system board [3].
42 Removing and installing components
4. Reroute the WLAN antenna cables.
Removing and installing components 43
Install
inner frame 1
Next steps
1. Install the coin cell battery.
2. Install the DC-in.
3. Install the memory module.
4. Install the WLAN.
5. Install the WWAN.
6. Install the battery.
7. Install the base cover.
8. Install the microSD card.
9. Follow the procedure in After working on your computer.
Touchpad buttons
Removing the touchpad button board
Prerequisites
1. Follow the procedure in before working with your computer.
2. Remove the microSD card.
3. Remove the base cover.
4. Remove the battery.
5. Remove the WWAN.
6. Remove the WLAN.
7. Remove the memory module.
8. Remove the DC-in port.
44 Removing and installing components
9. Remove the Coin cell battery.
10. Remove the Inner frame.
Steps
1. Open the latch and disconnect the touchpad button board cable from the connector on the touchpad board [1] .
2. Peel out the speaker cable tapes securing the touchpad buttons [2].
3. Remove the two (M2x3) screws that secure the touchpad button bracket to the palmrest [1].
4. Lift the touchpad button board bracket away from the computer [2].
Removing and installing components 45
Installing the touchpad button board
Steps
1. Place the touchpad button board into the slot on the palmrest [1].
2. Replace the two (M2x3) screws to secure the touchpad button board to the palmrest [2].
46 Removing and installing components
3. Adhere the speaker cable tapes securing the touchpad buttons [2].
4. Open the latch and fix the touchpad button board cable to the connector on the touchpad board [1]
Removing and installing components 47
Next steps
1. Install the Inner frame.
2. Install the coin cell battery.
3. Install the DC-in.
4. Install the memory module.
5. Install the WLAN.
6. Install the WWAN.
7. Install the battery.
8. Install the base cover.
9. Install the microSD card.
10. Follow the procedure in After working on your computer.
LED board
Removing the LED board
Prerequisites
1. Follow the procedure in before working with your computer.
2. Remove the microSD card.
3. Remove the base cover.
4. Remove the battery.
5. Remove the WWAN.
6. Remove the WLAN.
7. Remove the memory module.
8. Remove the DC-in port.
48 Removing and installing components
9. Remove the Coin cell battery.
10. Remove the Inner frame.
Steps
1. Disconnect and peel the USH daughter board Flexible Flat Cable (FFC) from the USH daughter board [1, 2].
2. Disconnect the LED board cable from the connector on the system board.
3. Unroute the LED board cable [2].
4. Peel the grey adhesive tape that secures the LED board [2].
5. Remove the single (M2x2.5) screw that secures LED board to the palmrest [1].
6. Lift the LED board away from the computer [2].
Removing and installing components 49
Remove
LED 1
Installing the LED board
Steps
1. Place the LED board and align the screw hole on the LED board with the screw hole on the palmrest [1].
2. Replace the single (M2x2.5) screw to secure the LED board to the palmrest [2].
50 Removing and installing components
3. Connect the LED board cable to the connector on the system board and route the LED board cable [1]
4. Connect and adhere the USH daughter board Flexible Flat Cable (FFC) from the USH daughter board.
Removing and installing components 51
Next steps
1. Install the Inner frame.
2. Install the coin cell battery.
3. Install the DC-in.
4. Install the memory module.
5. Install the WLAN.
6. Install the WWAN.
7. Install the battery.
8. Install the base cover.
9. Install the microSD card.
10. Follow the procedure in After working on your computer.
Speakers
Removing the speakers
Prerequisites
1. Follow the procedure in before working with your computer.
2. Remove the microSD card.
3. Remove the base cover.
4. Remove the battery.
5. Remove the WWAN.
6. Remove the WLAN.
7. Remove the memory module.
8. Remove the DC-in port.
52 Removing and installing components
9. Remove the Coin cell battery.
10. Remove the Inner frame.
Steps
1. Disconnect the speaker cable from the connector on the system board [1].
2. Peel the adhesive tape that secures the speaker cable to the palmrest [2].
3. Disconnect the touchpad cable from the connector on the daughter board [3].
4. Peel the adhesive tapes and unroute the speaker cable
Removing and installing components 53
5. Lift and remove the speakers away from the palmrest.
54 Removing and installing components
Installing the speakers
Steps
1. Using the alignment posts and rubber grommets, place the speakers in the slots on the palmrest.
Removing and installing components 55
Install
Speakers
2. Route the speaker cable through the routing guides.
56 Removing and installing components
3. Affix the adhesive tape to secure speaker cable to the palmrest [1, 2].
4. Connect the speaker cable to the connector on the system board [3].
Removing and installing components 57
Install
Speakers 2
Next steps
1. Install the Inner frame.
2. Install the coin cell battery.
3. Install the DC-in.
4. Install the memory module.
5. Install the WLAN.
6. Install the WWAN.
7. Install the battery.
8. Install the base cover.
9. Install the microSD card.
10. Follow the procedure in After working on your computer.
Heatsink assembly
Removing the heatsink assembly
Prerequisites
1. Follow the procedure in before working with your computer.
2. Remove the microSD card.
3. Remove the base cover.
4. Remove the battery.
5. Remove the WWAN.
6. Remove the WLAN.
7. Remove the memory module.
58 Removing and installing components
8. Remove the DC-in port.
9. Remove the Coin cell battery.
10. Remove the Inner frame.
Steps
1. Disconnect the system fan cable from the connector on the system board.
2. Remove the four (M2x3) screws that secure the heatsink assembly to the system board [1].
Installing the heatsink assembly
Steps
1. Place the heatsink assembly on the system board and align the screw holes on the heatsink with the screw holes on the
system board [1].
2. In sequential order (as indicated on the heatsink), tighten the four (M2x3) screws that secure the heatsink assembly to the
system board [2].
Removing and installing components 59
Next steps
1. Install the Inner frame.
2. Install the coin cell battery.
3. Install the DC-in.
4. Install the memory module.
5. Install the WLAN.
6. Install the WWAN.
7. Install the battery.
8. Install the base cover.
9. Install the microSD card.
10. Follow the procedure in After working on your computer.
System fan
Removing the system fan
Prerequisites
1. Follow the procedure in before working with your computer.
2. Remove the microSD card.
3. Remove the base cover.
4. Remove the battery.
60 Removing and installing components
5. Remove the WWAN.
6. Remove the WLAN.
7. Remove the memory module.
8. Remove the DC-in port.
9. Remove the Coin cell battery.
10. Remove the Inner frame.
Steps
1. Disconnect the system fan cable from the connector on the system board.
2. Remove the two (M2x5) screws that secure the system fan to the palmrest [1].
3. Lift the system fan away from the computer [2].
Removing and installing components 61
Installing the system fan
Steps
1. Place and align the screw holes on the system fan with the screw holes on to the palmrest [1].
2. Replace the two (M2x5) screws to secure the system fan to the palmrest [2].
62 Removing and installing components
3. Connect the system fan cable to the connector on the system board.
Removing and installing components 63
Next steps
1. Install the Inner frame.
2. Install the coin cell battery.
3. Install the DC-in.
4. Install the memory module.
5. Install the WLAN.
6. Install the WWAN.
7. Install the battery.
8. Install the base cover.
9. Install the microSD card.
10. Follow the procedure in After working on your computer.
System board
Removing the system board
Prerequisites
1. Follow the procedure in before working with your computer.
2. Remove the microSD card.
3. Remove the base cover.
4. Remove the battery.
5. Remove the WWAN.
6. Remove the WLAN.
7. Remove the memory module.
8. Remove the DC-in port.
64 Removing and installing components
9. Remove the Coin cell battery.
10. Remove the Inner frame.
11. Remove the heatsink.
12. Remove the system fan.
Steps
1. Peel the adhesive tape and disconnect the touch screen cable from the connector on the system board [1].
2. Remove the single (M2x4) screw that secures the eDP cable bracket to the system board [2].
3. Lift the eDP cable bracket from the system board [3].
4. Disconnect the eDP cable from the system board [4].
5. Disconnect the following cables:
a. Speaker cable [2].
b. LED board cable [1].
c. touchpad cable [3].
6. Remove the two (M2.5x4) screws that secures the system board [1].
7. Peel the adhesive tape and disconnect the cable from the connector on the system board [1].
8. Disconnect the sensor board cable from the connector on the system board [1].
Removing and installing components 65
9. Remove the two (M2.5x4) screws that secures the system board to the palmrest [1].
66 Removing and installing components
Installing the system board
Steps
1. Align and place the system board to the palmrest [1].
2. Replace the two (M2.5x4) screws to secure the system board to the palmrest [2].
Removing and installing components 67
3. Connect the following cables:
a. Speaker cable [2].
b. LED board cable [1].
c. touchpad cable [3].
68 Removing and installing components
4. Connect the eDP cable to the connector on the system board and adhere the adhesive tape [1].
5. Replace the eDP cable bracket on the eDP cable connector on the system board [2].
6. Replace the single (M2x4) screw that secures the eDP cable bracket to the system board [3, 4].
Removing and installing components 69
Next steps
1. Install the System fan.
2. Install the Heatsink.
3. Install the Inner frame.
4. Install the coin cell battery.
5. Install the DC-in.
6. Install the memory module.
7. Install the WLAN.
8. Install the WWAN.
9. Install the battery.
10. Install the base cover.
11. Install the microSD card.
12. Follow the procedure in After working on your computer.
Keyboard
Removing the keyboard
Prerequisites
1. Follow the procedure in before working with your computer.
2. Remove the microSD card.
70 Removing and installing components
3. Remove the base cover.
4. Remove the battery.
5. Remove the WWAN.
6. Remove the WLAN.
7. Remove the memory module.
8. Remove the DC-in port.
9. Remove the Coin cell battery.
Steps
1. Lift the latch and disconnect the backlit cable and the keyboard cable from the connectors on the touchpad.
2. Remove the M2x2.5 screws that secure the keyboard to the palmrest [1].
3. Remove the keyboard away from the computer [2]. The touchpad FFC covers one of the screws that secure the keyboard
assembly to the palmrest.
Removing and installing components 71
Installing the keyboard
Steps
1. Align and place the keyboard on the palmrest [1].
2. Replace the 18 (M2x2.5) screws to secure the keyboard to the palmrest [2].
72 Removing and installing components
3. Connect the backlit cable and the keyboard cable to the connectors on the touchpad.
Removing and installing components 73
4. Adhere the adhesive tape securing the keyboard and the smartcard board.
Next steps
1. Install the coin cell battery.
2. Install the DC-in.
3. Install the memory module.
4. Install the WLAN.
5. Install the WWAN.
6. Install the battery.
7. Install the base cover.
8. Install the microSD card.
9. Follow the procedure in After working on your computer.
Keyboard bracket
Removing the keyboard bracket
Prerequisites
1. Follow the procedure in before working with your computer.
2. Remove the microSD card.
3. Remove the base cover.
4. Remove the battery.
5. Remove the WWAN.
6. Remove the WLAN.
7. Remove the memory module.
8. Remove the DC-in port.
74 Removing and installing components
9. Remove the Coin cell battery.
10. Remove the Inner frame.
11. Remove the heatsink.
12. Remove the system fan.
13. Remove the speaker.
14. Remove the LED board.
15. Remove the system board.
16. Remove the keyboard.
Steps
1. Remove the six (M2x2) screws that secure the keyboard to the keyboard bracket [1].
2. Remove the keyboard from the keyboard bracket [2].
Installing the keyboard bracket
Steps
1. Align and place the keyboard on the keyboard bracket [1].
2. Replace the six (M2x2) screws to secure the keyboard on the keyboard bracket [2].
Next steps
1. Install the keyboard.
2. Install the system board.
3. Install the LED board.
4. Install the speaker.
5. Install the System fan.
6. Install the Heatsink.
7. Install the Inner frame.
8. Install the coin cell battery.
9. Install the DC-in.
10. Install the memory module.
11. Install the WLAN.
12. Install the WWAN.
13. Install the battery.
14. Install the base cover.
15. Install the microSD card.
16. Follow the procedure in After working on your computer.
Power button
Removing the power button
Prerequisites
1. Follow the procedure in before working with your computer.
2. Remove the microSD card.
3. Remove the base cover.
4. Remove the battery.
5. Remove the WWAN.
6. Remove the WLAN.
7. Remove the memory module.
8. Remove the DC-in port.
9. Remove the Coin cell battery.
10. Remove the Inner frame.
Removing and installing components 75
11. Remove the heatsink.
12. Remove the system fan.
13. Remove the speaker.
14. Remove the LED board.
15. Remove the system board.
16. Remove the keyboard.
Steps
1. Remove the two (M2x3) screws that secure the power button with the fingerprint reader on the palmrest [1].
2. Lift the power button with fingerprint reader board off the palmrest [2].
Installing the power button
Steps
1. Place the power button with fingerprint reader on the palmrest [1].
2. Replace the two (M2x3) screws that secure the power button with fingerprint reader on the palmrest [2].
76 Removing and installing components
Next steps
1. Install the keyboard.
2. Install the system board.
3. Install the LED board.
4. Install the speaker.
5. Install the System fan.
6. Install the Heatsink.
7. Install the Inner frame.
8. Install the coin cell battery.
9. Install the DC-in.
10. Install the memory module.
11. Install the WLAN.
12. Install the WWAN.
13. Install the battery.
14. Install the base cover.
15. Install the microSD card.
16. Follow the procedure in After working on your computer.
Display assembly
Removing the display assembly
Prerequisites
1. Follow the procedure in before working with your computer.
2. Remove the microSD card.
Removing and installing components 77
3. Remove the base cover.
4. Remove the battery.
Steps
1. Peel the adhesive tape and disconnect the cable from the connector on the system board [1].
2. Remove the two (M2x4) screws that secures the eDP cable bracket to the system board [2].
3. Lift the eDP cable bracket from the system board [3].
4. Disconnect and unroute the eDP cable [4].
5. Open the display assembly to a 180-degree angle and flip over the system, and then place the system on a flat surface.
78 Removing and installing components
6. Remove the four (M2.5x4) screws that secure the display assembly to the system chassis [1].
7. Remove the display assembly from the system [2].
Removing and installing components 79
Installing the display assembly
About this task
NOTE: Ensure that the hinges are opened to the maximum before replacing the display assembly on the palmrest and
keyboard assembly.
Steps
1. Align and place the system chassis under the hinges of the display assembly [1].
2. Replace the four (M2.5x3) screws that secures the display assembly to the system chassis [2].
80 Removing and installing components
3. Seat the system chassis on the display assembly.
Removing and installing components 81
4. Connect the cable to the connector on the system board and adhere the adhesive tape [1].
5. Reroute the eDP cable and connect it to the eDP connector [2].
6. Place the eDP cable bracket on the system board [3].
7. Replace the two (M2x4) screws that secures the eDP cable bracket to the system board [4].
82 Removing and installing components
Next steps
1. Install the battery.
2. Install the base cover.
3. Install the microSD card.
4. Follow the procedure in After working on your computer.
Display bezel
Removing display bezel
Prerequisites
1. Follow the procedure in before working with your computer.
2. Remove the microSD card.
3. Remove the base cover.
4. Remove the battery.
5. Remove the display assembly.
Steps
1. NOTE: Display bezel cannot be reused after being removed.
Removing and installing components 83
Use a plastic scribe to carefully pry open the recesses near the left and right hinges on the bottom edge of the display bezel
[1]. When prying open the display bezel, ensure to pry along the outside edge of the display bezel using your hands or plastic
scribes—using a screw driver or other sharp objects may damage the display cover.
2. Carefully pry open the inside edge of the display bezel and then pry open the inside edge of the left and right sides of the
display bezel [2].
3. Lift the display bezel from the display assembly.
84 Removing and installing components
Installing the display bezel
Steps
Align the display bezel with the display assembly, and then gently snap the display bezel into place.
Removing and installing components 85
86 Removing and installing components
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 on your computer.
Display panel
Removing display panel
Prerequisites
1. Follow the procedure in before working with your computer.
2. Remove the microSD card.
3. Remove the base cover.
4. Remove the battery.
5. Remove the WWAN.
6. Remove the WLAN.
7. Remove the Inner frame.
8. Remove the display assembly.
9. Remove the Display hinges.
Steps
1. Remove the (M2.5x3) screws that secure the display panel to the display assembly [1] and lift to turn over the display panel
to access the display cable [2].
Removing and installing components 87
2. Peel the conductive tape [1] on the display cable connector.
3. Remove the adhesive strip that secures the display cable connector [2]
4. Lift the latch and disconnect the display cable from the connector on the display panel. Do not pull and release the Stretch
(SR) Tapes from the display panel. There is no need to separate the brackets from the display panel [3,4].
88 Removing and installing components
Removing and installing components 89
Installing display panel
Steps
1. Connect the display cable to the connector and close the latch [1, 2].
2. Adhere the adhesive strip to secure the display cable connector [3, 4].
3. Adhere the conductive tape to secure the display cable connector . LCD Panel comes with two (L+R) brackets that needs to
toe-in first, then secure two screws located at the base of the LCD panel.
4. Replace the two (M2.5x3) screws that secure the display panel to the display assembly.
90 Removing and installing components
Next steps
1. Install the Display hinges.
2. Install the display assembly.
3. Install the battery.
4. Install the base cover.
5. Install the microSD card.
6. Install the WLAN.
7. Install the WWAN.
8. Install the Inner frame.
9. Follow the procedure in After working on your computer.
Camera
Removing camera
Prerequisites
1. Follow the procedure in before working with your computer.
2. Remove the microSD card.
3. Remove the base cover.
4. Remove the battery.
5. Remove the WWAN.
6. Remove the WLAN.
Removing and installing components 91
7. Remove the Inner frame.
8. Remove the Display hinge
9. Remove the display assembly.
Steps
1. Peel the two conductive tape that secures the camera in place [1]
2. Carefully pry and lift the camera module from the display back cover [2].
3. Disconnect the camera cable from the connector on the camera module .
Installing camera
Steps
1. Connect the camera cable to the connector on the camera module [1].
92 Removing and installing components
2. Insert the camera into the slot on the display back cover .
3. Affix the two conductive tape above the camera [2].
Next steps
1. Install the display assembly.
2. Install the WLAN.
3. Install the WWAN.
4. Install the battery.
5. Install the base cover.
6. Install the Inner frame.
7. Install the microSD card.
8. Follow the procedure in After working on your computer.
Hinge caps
Removing hinge caps
Prerequisites
1. Follow the procedure in before working with your computer.
2. Remove the microSD card.
3. Remove the base cover.
4. Remove the battery.
5. Remove the WWAN.
Removing and installing components 93
6. Remove the WLAN.
7. Remove the display assembly.
8. Remove the Display panel
Steps
1. Remove the two (M2x3) screws that secure the hinge caps to the chassis [1].
2. Pinch the hinge caps to release the hinge caps from the ribs on the display back cover then slide inwards to remove the
hinge caps from the display hinge [2].
Installing hinge caps
Steps
1. Place the hinge caps and slide outward on the display hinges [1].
2. Replace the two (M2x3) screws to secure the hinge caps to the display hinge.
94 Removing and installing components
Next steps
1. Replace the Display panel
2. Install the display assembly.
3. Install the WLAN.
4. Install the WWAN.
5. Install the battery.
6. Install the base cover.
7. Install the microSD card.
8. Follow the procedure in After working on your computer.
Display hinges
Removing display hinge
Prerequisites
1. Follow the procedure in before working with your computer.
2. Remove the microSD card.
3. Remove the base cover.
4. Remove the battery.
5. Remove the WWAN.
6. Remove the WLAN.
7. Remove the Display assembly.
Removing and installing components 95
8. Remove the Display panel.
Steps
1. Remove the four (M2.5x3) screws that secure the display hinge to the display assembly [1].
2. Remove the display hinges from the display back cover [2].
Installing display hinge
Steps
1. Place the display hinge on the display assembly.
2. Replace the four (M2.5x3) screws to secure the display hinge to the display assembly.
96 Removing and installing components
a. Install the Display panel.
b. Install the Dsiplay assembly.
c. Install the WLAN.
d. Install the WWAN.
e. Install the battery.
f. Install the base cover.
g. Install the microSD card.
h. Follow the procedure in After working on your computer.
Display (eDP) cable
Removing display cable
Prerequisites
1. Follow the procedure in before working with your computer.
2. Remove the microSD card.
3. Remove the base cover.
4. Remove the battery.
5. Remove the WWAN.
6. Remove the WLAN.
7. Remove the display assembly.
8. Remove the Display bezel.
9. Remove the Display hinge.
Removing and installing components 97
10. Remove the Display panel
11. Remove the Camera
Steps
Peel the conductive tape and unroute the display cable to release it from adhesive and lift the display cable from the display
back cover.
Installing display cable
Steps
1. Adhere the display cable to the display back cover.
2. Adhere the conductive tape and route the display cable to the display back cover.
98 Removing and installing components
Next steps
1. Install the Camera.
2. Install the Display panel
3. Install the Display hinge
4. Install the display assembly.
5. Install the WLAN.
6. Install the WWAN.
7. Install the battery.
8. Install the base cover.
9. Install the microSD card.
10. Follow the procedure in After working on your computer.
Display back cover assembly
Replacing the display back cover
Prerequisites
1. Follow the procedure in before working with your computer.
2. Remove the microSD card.
3. Remove the base cover.
4. Remove the battery.
5. Remove the WWAN.
6. Remove the WLAN.
7. Remove the memory module.
8. Remove the DC-in port.
9. Remove the Coin cell battery.
Removing and installing components 99
10. Remove the Inner frame.
11. Remove the heatsink.
12. Remove the system fan.
13. Remove the speaker.
14. Remove the LED board.
15. Remove the system board.
16. Remove the keyboard.
17. Remove the power button.
18. Remove the display assembly.
19. Remove theDisplay hinges.
20. Remove the Display panel.
21. Remove the Camera
About this task
After performing the preceding steps, you are left with the display back cover.
Next steps
1. Install the power button.
2. Install the keyboard.
3. Install the system board.
4. Install the LED board.
5. Install the display assembly
6. Install the Inner frame.
7. Install the coin cell battery.
8. Install the DC-in.
9. Install the memory module.
10. Install the WLAN.
11. Install the WWAN.
12. Install the battery.
100 Removing and installing components
13. Install the base cover.
14. Install the microSD card.
15. Follow the procedure in After working on your computer.
Palmrest assembly
Replacing the palmrest assembly
Prerequisites
1. Follow the procedure in before working with your computer.
2. Remove the microSD card.
3. Remove the base cover.
4. Remove the battery.
5. Remove the WWAN.
6. Remove the WLAN.
7. Remove the memory module.
8. Remove the DC-in port.
9. Remove the Coin cell battery.
10. Remove the Inner frame.
11. Remove the heatsink.
12. Remove the system fan.
13. Remove the speaker.
14. Remove the LED board.
15. Remove the system board.
16. Remove the keyboard.
17. Remove the power button.
18. Remove the display assembly.
19. Remove the touchpad button board .
About this task
After performing the preceding steps, you are left with the palmrest and keyboard assembly.
Removing and installing components 101
Next steps
1. Install the touchpad button board.
2. Install the display assembly.
3. Install the power button.
4. Install the keyboard.
5. Install the system board.
6. Install the LED board.
7. Install the speaker.
8. Install the System fan.
9. Install the Heatsink.
10. Install the Inner frame.
11. Install the coin cell battery.
12. Install the DC-in.
13. Install the memory module.
14. Install the WLAN.
15. Install the WWAN.
16. Install the battery.
17. Install the base cover.
18. Install the microSD card.
19. Follow the procedure in After working on your computer.
102 Removing and installing components
Troubleshooting
Topics:
•Basic troubleshooting
•CROSH
•Recovery Chromebook
•Reset Chromebook
•LCD Built-in Self Test (BIST)
•LED Indicators and Characteristics
•Diagnostic LEDs
•M-BIST
•Diagnostics
Basic troubleshooting
This page contains all the information for Dell Latitude 5400 Chrome basic troubleshooting
NOTE: Refer to https://support.google.com/chrome/a/?hl=en#topic=4386908 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 2. Power issue (continued)
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.
4
Troubleshooting 103
Table 2. Power issue
Power issues
5. Remove the AC adapter, and turn on with the battery
power only.
Display issue
Table 3. 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 4. 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.
104 Troubleshooting
Table 4. Audio, screen, and camera issues
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 5. 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 6. Touchpad and hotkeys issues (continued)
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:
Troubleshooting 105
Table 6. Touchpad and hotkeys issues
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 7. Chrome OS issue (continued)
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 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).
106 Troubleshooting
Table 7. Chrome OS issue
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 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 Dell BIOS, the F12 boot menu, or DellConnect. Most of the 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 <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.
Troubleshooting 107
CROSH commands
The table below lists the available commands in Chrome Shell (CROSH).
Table 8. Help commands
Command Purpose
exit Exits the CROSH Shell.
help Displays this help.
help_advanced Displays the help for more advanced commands, which are
used for debugging.
ping [-c count] [-i interval] [-n] [-s packetsize] [-W waittime] —
Sends ICMP ECHO_REQUEST packets to a network host. If
it is "gw", then the next hop gateway for the default route
is used. It works 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 9. 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 specifies the capability of a pairing agent the
console provides; see the Bluetooth Core specification 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.
ff_debug [<tag_expr>] [--help] [--list_valid_tags] [--reset] Adds and removes flimflam 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 Configures the modem for the specified carrier.
network_diag[--date] [--link] [--show-macs] [--wifi] [--
help] [--wifi-mon] <host>
Performs a suite of network diagnostics and saves a copy of
the output to your download directory
network_logging <wifi|cellular|ethernet> Enables a predefined set of tags useful for debugging the
specified device.
108 Troubleshooting
Table 9. Advanced help command
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 <network-id>] [-u <username>] [-p
<password>] <apn>
Sets the APN to use when connecting to the network
specified by <network-id>. If <network-id> 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 <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 configuration. Can be used to play/record
audio samples and enable beam forming on Pixel. sound
beamforming <on|off > will enable/disable the feature.
sound record [duration] will start recording. sound play
<filename> 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 <message> Logs a message to system log.
tpcontrol{status | taptoclick [on|off] sensitivity [1-5] | set
<property>< value>} tpcontrol {syntp [on|off]}
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|off > Turns autorepeat on/off. If a keycode is specified, it affects
only that key. If not specified, it affects global behavior.
Troubleshooting 109
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 10. 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
Following are the 12 most helpful chrome:// commands that you should know:
110 Troubleshooting
1. 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.
2. chrome://dns: This displays the list of host names for which the browser will pre-fetch the DNS records.
3. chrome://downloads: This is also available from the Menu > Downloads. Shortcut key is Ctrl+J.
Troubleshooting 111
4. chrome://extensions: This is also available from the Menu > Tools > Extensions.
5. chrome://bookmarks: This is also available from the Menu > Bookmarks > Bookmark Manager. Short cut key is
Ctrl+Shift+O.
112 Troubleshooting
6. chrome://history: This is also available from the Menu > History. Short cut key is Ctrl+H.
7. 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.
8. NOTE: Net-internals events viewer and related functionality has been removed. Please use Chrome://net-export to
save netlogs and the external Catapult netlog_viewer to view them.
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/.
Troubleshooting 113
9. 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.
10. chrome://sessions: This displays the number of sessions and magic list that are currently running.
11. 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.
114 Troubleshooting
12. 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 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.
Troubleshooting 115
4. Press CTRL + ALT + T to open CROSH.
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.
116 Troubleshooting
2. Turn on and sign in to Chromebook.
3. Open the Chrome browser.
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.
Troubleshooting 117
●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.
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.
118 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:
Troubleshooting 119
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.
120 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.
Troubleshooting 121
7. If the diagnostic test returns a failure message, make sure the Wi-Fi adapter is enabled and connect to a network.
Recovery Chromebook
This page contains information about recovering Dell Latitude 5400 Chrome.
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 11. USB flash drive or SD card (continued)
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 the link https://dl.google.com/dl/chromeos/
recovery/chromeosimagecreatorV2.exe 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.
122 Troubleshooting
Table 11. USB flash drive or SD card
Operating System Instructions
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 the link https://dl.google.com/dl/chromeos/
recovery/chromeosimagecreatorV2.exe 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 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. Click the link https://dl.google.com/dl/edgedl/chromeos/
recovery/linux_recovery.sh 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 123
Troubleshooting Tips
Table 12. 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.
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.
Reset Chromebook
This page contains all information about resetting Dell Latitude 5400 Chrome.
All local user data stored on the Chrome OS 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 Chrome OS 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 Chrome OS to its original factory state:
1. Click the status area in the lower-right corner, where your account picture appears.
124 Troubleshooting
2. Click Settings as highlighted from the picture below.
3. Click Show advanced settings to expand the menu.
Troubleshooting 125
4. Click the Powerwash button.
5. Click Restart when prompted.
126 Troubleshooting
NOTE: You can also reset your Chrome OS from the sign-in screen by holding down the keys Ctrl+Alt+Shift+R and
clicking Restart. (If you are signed in to your Chrome OS, sign out first before you press on Ctrl+Alt+Shift+R, then
click Restart. Once the Chrome OS is restarted, click Reset.)
6. After you restart the Chrome OS, you should now see the setup screen. Click on Powerwash button.
7. Confirm powerwash by clicking on Continue button.
Troubleshooting 127
8. Powerwash may take some time to complete. Let the screen transition to Chrome Operating System welcome screen and
make sure you sign in with your primary Google Account, because this account is set as the owner account.
LCD Built-in Self Test (BIST)
Dell laptops have a built-in diagnostic tool that helps you determine if the screen abnormality you are experiencing is an inherent
problem with the LCD (screen) of the Dell laptop or with the video card (GPU) and PC settings.
When you notice screen abnormalities like flickering, distortion, clarity issues, fuzzy or blurry image, horizontal or vertical lines,
color fade etc., it is always a good practice to isolate the LCD (screen) by running the Built-In Self Test (BIST).
128 Troubleshooting
How to invoke LCD BIST Test
1. Power off the Dell laptop.
2. Disconnect any peripherals that are connected to the laptop. Connect only the AC adapter (charger) to the laptop.
3. Ensure that the LCD (screen) is clean (no dust particles on the surface of the screen).
4. Press and hold D key and Power on the laptop to enter LCD built-in self test (BIST) mode. Continue to hold the D key, until
you see color bars on the LCD (screen).
5. The screen will display multiple color bars and change colors on the entire screen to red, green, and blue.
6. Carefully inspect the screen for abnormalities.
7. Press Esc key to exit.
NOTE: Dell SupportAssist Pre-boot diagnostics upon launch, initiates an LCD BIST first, expecting a user intervention
confirm functionality of the LCD.
LED Indicators and Characteristics
Battery charge and status LED
Table 13. Battery charge and status LED Indicator
Power Source LED Behavior computer Power State Battery Charge Level
AC Adapter Off S0 - S5 Fully Charged
AC Adapter Solid White S0 - S5 < Fully Charged
Battery Off S0 - S5 11-100%
Battery Solid Amber (590+/-3 nm) S0 - S5 < 10%
●S0 (ON) - Computer is turned on.
●S4 (Hibernate) - The computer consumes the least power compared to all other sleep states. The computer is almost at an
OFF state, expect for a trickle power. The context data is written to hard drive.
●S5 (OFF) - The computer is in a shutdown state.
Diagnostic LEDs
Instead of beep codes, errors are indicated via the bicolor Battery Charge/Status LED. A specific blink pattern is followed by
flashing a pattern of flashes in amber, followed by white. The pattern then repeats.
The diagnostic pattern will consist of a two-digit number being represented by a first group of LED blinks (1 through 9) in
amber, followed by a 1.5 second pause with the LED off, and then a second group of LED blinks (1 through 9) in white. This is
then followed by a three second pause, with the LED off, before repeating over again. Each LED blink takes 1.5 seconds.
The system will not shutdown when displaying the Diagnostic Error Codes.
Diagnostic Error Codes will always supersede any other use of the LED. For instance, on laptops, battery codes for Low Battery
or Battery Failure situations will not be displayed when Diagnostic Error Codes are being displayed.
Table 14. Diagnostic LEDs
Blinking
Pattern
Problem Description Suggested Resolution
Amber White
2 1 CPU failure Replace the system board.
2 2 System board failure (included BIOS corruption or ROM error) Flash latest BIOS version. If problem
persists, replace the system board.
Troubleshooting 129
Table 14. Diagnostic LEDs
Blinking
Pattern
Problem Description Suggested Resolution
Amber White
2 3 No memory/RAM detected Confirm that the memory module is
installed properly. If problem persists,
replace the memory module.
2 4 Memory/RAM failure Replace the memory module.
2 5 Invalid memory installed Replace the memory module.
2 6 System board/Chipset error Replace the system board.
2 7 LCD failure Replace the LCD module.
2 8 LCD Power rail failure Replace the system board.
3 1 CMOS battery failure Replace the RTS battery.
3 2 PCI or Video card/chip failure Replace the system board.
3 3 BIOS Recovery Image not found Flash latest BIOS version. If problem
persists, replace the system board.
3 4 BIOS Recovery Image found but invalid Flash latest BIOS version. If problem
persists, replace the system board.
For diagnostics pattern 2-amber, 8-white connect an external monitor to isolate between system board or graphics controller
failure.
M-BIST
M-BIST (Built In Self-Test) diagnostics tool, featuring improved accuracy in system board failures.
NOTE: M-BIST can be manually initiated before POST (Power On Self Test).
How to run M-BIST
NOTE: M-BIST must be initiated on the system from a power-off state either connected to AC power or with battery only.
1. Press and hold both the M key on the keyboard and the power button to initiate M-BIST.
2. With both the M key and the power button held down, the battery indicator LED may exhibit two states:
a. OFF: No fault detected with the system board
b. AMBER: Indicates a problem with the system board
Diagnostics
This chapter details the built in troubleshooting features to diagnose the Dell Latitude 5400 Chrome systems. It also lists the
invoking instructions along with related information for each diagnostics method.
ePSA Diagnostics
The ePSA diagnostics (also known as system diagnostics) performs a complete check of your hardware. The ePSA is embedded
with the BIOS and is launched by the BIOS internally. The embedded system diagnostics provides a set of options for particular
devices or device groups allowing you to:
●Run tests automatically or in an interactive mode
●Repeat tests
130 Troubleshooting
●Display or save test results
●Run thorough tests to introduce additional test options to provide extra information about the failed device(s)
●View status messages that inform you if tests are completed successfully
●View error messages that inform you of problems encountered during testing
NOTE: The Enhanced Pre-boot System Assessment window displays, listing all devices detected in the computer. The
diagnostics starts running the tests on all the detected devices.
Running ePSA diagnostics
1. Press and Hold the Power and F2 to boot into Chrome OS recovery menu.
2. Press F12 or Ctrl + C key on the keyboard to go to diagnostics screen.
3. Press the Power button to launch ePSA.
ePSA User Interface
This section contains information on ePSA 3.0’s Basic and Advanced Screen.
ePSA opens basic screen on start. You can switch to advanced screen using the arrow icon on the bottom. Advanced screen
shows detected devices on the left column. Specific test can be included or excluded only in the interactive mode.
ePSA Basic Screen
The Basic Screen has minimal controls which allows easy navigation for user to start or stop the diagnostic.
Troubleshooting 131
LCD Test
The ePSA starts with LCD pixel test, where color bars are displayed on the screen. Check for any flaws with pixels on the
screen
●Dead Pixels: Black dot
●Bright Pixels: Bright dot
Confirm the LCD functionality by pressing Yes or No on the next screen.
ePSA Advanced Screen
132 Troubleshooting
The advanced screen allows more directed testing and contains more detail information about the overall health of the system.
The user can get to this screen by simply swiping your finger to the left on touchscreen systems or clicking the next page
button on the lower right hand side of the basic screen.
Figure 1. System Health
Figure 2. Configuration
Troubleshooting 133
Figure 3. Results
Figure 4. Event Logs
To run test on specific device or run a specific test
1. To run a diagnostic test on a specific device, press Esc and click Yes to stop the diagnostic test.
2. Select the device from the left pane and click Run Tests or use Advanced Option to include or exclude any Test.
ePSA Error Messages
When the Dell ePSA Diagnostic detects an error while running, it will pause the test and then popup a window as shown below :
134 Troubleshooting
NOTE: If all the test passes you get a QR code to show the test results.
●By responding to Yes, the diagnostic will continue testing the next device and the error details will be available in the
summary report.
●By responding to No, the diagnostic will stop testing the remaining untested device.
●By responding to Retry, the diagnostic will ignore the error and rerun the last test.
Capture the error code with Validation code or Scan QR code and Contact Dell
NOTE: As part of the new feature, user can now mute the beeping sound code when there is an error , by pressing on
at the bottom right side of the error window.
NOTE: Some tests for specific devices require user interaction. Always ensure that you are present at the computer
terminal when the diagnostic tests are performed.
Validation Tools
This section contains information on how to validate the SupportAssist ePSA, ePSA or PSA error codes.
Error code verification can be done using below two methods :
●Online Enhanced Preboot System Assessment Validation Tool.
●QR scanning using QR APP on Smart Phone.
Online SupportAssist On-board Diagnostics, ePSA or PSA Error Codes
Validation Tool
Usage Guide
Steps
1. User to obtain information from SupportAssist error windows.
Troubleshooting 135
2. Navigate to https://www.dell.com/support/diagnose/Pre-boot-Analysis.
3. Enter error code, validation code, and service tag. Part serial number is optional.
NOTE: For error code, use only the last 3 or 4 digits of the code. (user can enter 0142 or 142 instead of 2000–0142.)
4. Click on Submit once all the necessary information is entered.
136 Troubleshooting
Results
Valid Error Code Example
After entering the correct information, the online tools will direct the user to the above screen which contains information on :
Troubleshooting 137
●Confirmation of the error code and result outcome
●Suggested Part Replacement
●If customer is still covered under Dell Warranty
●Case reference number if there is an open case under the service tag
Invalid Error Code Example
QR APP Validation Tool
About this task
Besides using the online tool, customers can also validate the error code by scanning the QR code with a QR APP on a
smartphone.
Steps
1. User to obtain the QR code from SupportAssist On-board Diagnostics error screen.
2. User can use any QR code scanner application through the smartphone to scan the QR code.
138 Troubleshooting
3. The QR code scanner application will scan the code and automatically generate a link. Click the link to proceed.
Troubleshooting 139
Results
The link generated will take the customer to the Dell Support website which contains information on:
●Confirmation of the error code and result outcome
●Suggested Part Replacement
●If customer is still covered under Dell Warranty
●Case reference number if there is an open case under the service tag
140 Troubleshooting
Troubleshooting 141
Getting help and contacting Dell
Self-help resources
You can get information and help on Latitude 5400 Chrome and other Dell products and services using these self-help
resources:
Table 15. Self-help resources
Self-help resources Resource location
Information about Dell products and services https://www.dell.com
Online help for operating system https://www.dell.com/support/article/sln293900
Troubleshooting information, user manuals, setup instructions,
product specifications, technical help blogs, drivers, software
updates, and so on.
https://www.dell.com/support
Dell knowledge base articles for a variety of computer
concerns.
https://www.dell.com/support/home/app=knowledgebase
Learn and know the following information about your product:
●Product specifications
●Operating system
●Setting up and using your product
●Data backup
●Troubleshooting and diagnostics
●Factory and system restore
See Service Manual and Setup and Specifications at https://
www.dell.com/support/manuals.
To locate the Service Manual and Setup and Specifications
relevant to your product, identify your product through one of
the following:
●Select Detect Product.
●Locate your product through the drop-down menu under
View Products.
●Enter the Service Tag number or Product ID in the
search bar.
Contacting Dell
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.
To contact Dell for sales, technical support, or customer service issues, see https://www.dell.com/contactdell.
NOTE: Availability varies by country/region and product, and some services may not be available in your country/region.
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:
1. Go to https://www.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
142 Getting help and contacting Dell