Table of Contents
- Latitude 5431 Service Manual
- Contents
- Working inside your computer
- Removing and installing components
- Recommended tools
- Screw list
- Major components of Latitude 5431
- SIM card
- Micro Secure Digital (SD) Card
- Base cover
- Wireless card
- Wireless Wide Area Network (WWAN) Card
- Solid-state drives
- Memory
- Battery
- Battery cable
- Assembly inner frame
- LED board
- Heat sink
- Speakers
- System board
- Power button with fingerprint reader
- Smart card reader
- Coin-cell battery
- Keyboard assembly
- Keyboard bracket
- Display assembly
- Display bezel
- Display panel
- Camera
- eDP/display cable
- Sensor board
- Display hinges
- Display back cover
- Dummy SIM-card slot filler
- Palm-rest assembly
- Drivers and downloads
- BIOS setup
- Troubleshooting
- Handling swollen Lithium-ion batteries
- Dell SupportAssist Pre-boot System Performance Check diagnostics
- Built-in self-test (BIST)
- System-diagnostic lights
- Recovering the operating system
- Real-Time Clock (RTC Reset)
- Auto RTC reset
- Backup media and recovery options
- WiFi power cycle
- Drain residual flea power (perform hard reset)
- Getting help and contacting Dell
DELL 5431 User Manual
Displayed below is the user manual for 5431 by DELL which is a product in the Notebooks category. This manual has pages.
Related Manuals
Latitude 5431
Service Manual
Regulatory Model: P137G
Regulatory Type: P137G007/P137G008
April 2022
Rev. A00
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.
© 2022 Dell Inc. or its subsidiaries. All rights reserved. Dell Technologies, Dell, and other trademarks are trademarks of Dell Inc. or its
subsidiaries. Other trademarks may be trademarks of their respective owners.
Chapter 1: Working inside 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
BitLocker........................................................................................................................................................................ 10
Chapter 2: Removing and installing components...........................................................................11
Recommended tools...........................................................................................................................................................11
Screw list.............................................................................................................................................................................. 11
Major components of Latitude 5431..............................................................................................................................12
SIM card............................................................................................................................................................................... 14
Removing the SIM card.............................................................................................................................................. 14
Installing the SIM card................................................................................................................................................ 15
Micro Secure Digital (SD) Card...................................................................................................................................... 17
Removing the microSD card...................................................................................................................................... 17
Installing the microSD card........................................................................................................................................ 17
Base cover........................................................................................................................................................................... 18
Removing the base cover...........................................................................................................................................18
Installing the base cover............................................................................................................................................ 20
Wireless card.......................................................................................................................................................................21
Removing the wireless card.......................................................................................................................................21
Installing the wireless card........................................................................................................................................ 23
Wireless Wide Area Network (WWAN) Card............................................................................................................. 25
Removing the WWAN card....................................................................................................................................... 25
Installing the WWAN card......................................................................................................................................... 26
Solid-state drives...............................................................................................................................................................27
Removing the 2230 solid-state drive .................................................................................................................... 27
Installing the 2230 solid-state drive........................................................................................................................28
Removing the 2280 solid-state drive..................................................................................................................... 30
Installing the 2280 solid-state drive........................................................................................................................30
Memory................................................................................................................................................................................32
Removing the memory modules...............................................................................................................................32
Installing the memory module...................................................................................................................................32
Battery................................................................................................................................................................................. 33
Lithium-ion battery precautions...............................................................................................................................33
Removing the 4-cell battery..................................................................................................................................... 34
Installing the 4-cell battery....................................................................................................................................... 35
Battery cable...................................................................................................................................................................... 35
Removing the 4-cell battery cable .........................................................................................................................35
Installing the 4-cell battery cable............................................................................................................................ 36
Contents
Contents 3
Assembly inner frame....................................................................................................................................................... 37
Removing the assembly inner frame.......................................................................................................................37
Installing the assembly inner frame.........................................................................................................................39
LED board............................................................................................................................................................................ 41
Removing the LED board........................................................................................................................................... 41
Installing the LED board............................................................................................................................................. 42
Heat sink..............................................................................................................................................................................43
Removing the heat sink and fan assembly - UMA...............................................................................................43
Installing the heat sink and fan assembly - UMA.................................................................................................44
Removing the heat sink and fan assembly—discrete........................................................................................ 45
Installing the heat sink and fan assembly—discrete...........................................................................................47
Speakers.............................................................................................................................................................................. 48
Removing the speakers..............................................................................................................................................48
Installing the speakers................................................................................................................................................ 48
System board..................................................................................................................................................................... 50
Removing the system board.....................................................................................................................................50
Installing the system board....................................................................................................................................... 54
Power button with fingerprint reader.......................................................................................................................... 57
Removing the power button.....................................................................................................................................57
Installing the power button....................................................................................................................................... 59
Smart card reader............................................................................................................................................................. 60
Removing the smart card reader.............................................................................................................................60
Installing the smart card reader................................................................................................................................61
Coin-cell battery................................................................................................................................................................62
Removing the coin-cell battery................................................................................................................................62
Installing the coin-cell battery.................................................................................................................................. 63
Keyboard assembly........................................................................................................................................................... 64
Removing the keyboard assembly...........................................................................................................................64
Installing the keyboard assembly............................................................................................................................. 65
Keyboard bracket.............................................................................................................................................................. 67
Removing the keyboard bracket.............................................................................................................................. 67
Installing the keyboard bracket................................................................................................................................ 68
Display assembly................................................................................................................................................................70
Removing the display assembly................................................................................................................................70
Installing the display assembly..................................................................................................................................72
Display bezel....................................................................................................................................................................... 76
Removing the display bezel.......................................................................................................................................76
Installing the display bezel......................................................................................................................................... 77
Display panel....................................................................................................................................................................... 79
Removing the display panel.......................................................................................................................................79
Installing the display panel.........................................................................................................................................82
Camera.................................................................................................................................................................................86
Removing the camera................................................................................................................................................ 86
Installing the camera................................................................................................................................................... 87
Removing the infrared camera.................................................................................................................................88
Installing the infrared camera...................................................................................................................................90
eDP/display cable.............................................................................................................................................................. 91
Removing the eDP/display cable............................................................................................................................. 91
Installing the eDP cable..............................................................................................................................................92
Sensor board...................................................................................................................................................................... 94
4Contents
Removing the sensor board...................................................................................................................................... 94
Installing the sensor board........................................................................................................................................ 94
Display hinges.....................................................................................................................................................................95
Removing the display hinges.................................................................................................................................... 95
Installing the display hinges...................................................................................................................................... 96
Display back cover............................................................................................................................................................ 98
Removing the display back cover............................................................................................................................98
Installing the display back cover.............................................................................................................................. 98
Dummy SIM-card slot filler............................................................................................................................................. 99
Removing the dummy SIM-card slot filler.............................................................................................................99
Installing the dummy SIM-card slot filler.............................................................................................................. 101
Palm-rest assembly......................................................................................................................................................... 104
Removing the palm-rest assembly.........................................................................................................................104
Installing the palm-rest assembly...........................................................................................................................106
Chapter 3: Drivers and downloads.............................................................................................. 108
Chapter 4: BIOS setup............................................................................................................... 109
Entering BIOS setup program.......................................................................................................................................109
Navigation keys................................................................................................................................................................109
One time boot menu....................................................................................................................................................... 109
System setup options......................................................................................................................................................110
Updating the BIOS........................................................................................................................................................... 119
Updating the BIOS in Windows............................................................................................................................... 119
Updating the BIOS in Linux and Ubuntu.............................................................................................................. 120
Updating the BIOS using the USB drive in Windows........................................................................................ 120
Updating the BIOS from the F12 One-Time boot menu................................................................................... 120
System and setup password..........................................................................................................................................121
Assigning a system setup password......................................................................................................................122
Deleting or changing an existing system setup password............................................................................... 122
Clearing CMOS settings.................................................................................................................................................122
Clearing BIOS (System Setup) and System passwords......................................................................................... 123
Chapter 5: Troubleshooting....................................................................................................... 124
Handling swollen Lithium-ion batteries.......................................................................................................................124
Dell SupportAssist Pre-boot System Performance Check diagnostics..............................................................124
Running the SupportAssist Pre-Boot System Performance Check.............................................................. 125
Built-in self-test (BIST)..................................................................................................................................................125
M-BIST......................................................................................................................................................................... 125
LCD Power rail test (L-BIST)................................................................................................................................. 126
LCD Built-in Self Test (BIST)..................................................................................................................................126
System-diagnostic lights................................................................................................................................................126
Recovering the operating system................................................................................................................................128
Real-Time Clock (RTC Reset)...................................................................................................................................... 128
Auto RTC reset................................................................................................................................................................ 128
Backup media and recovery options........................................................................................................................... 129
WiFi power cycle..............................................................................................................................................................129
Drain residual flea power (perform hard reset)........................................................................................................129
Contents 5
Working inside your computer
Safety instructions
Use the following safety guidelines to protect your computer from potential damage and to ensure your personal safety. Unless
otherwise noted, each procedure included in this document assumes that you have read the safety information that shipped
with your computer.
WARNING: Before working inside your computer, read the safety information that is shipped with your
computer. For more safety best practices, see the Regulatory Compliance home page at www.dell.com/
regulatory_compliance.
WARNING: Disconnect your computer from 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 your
computer to an electrical outlet.
CAUTION: To avoid damaging the computer, ensure that the work surface is flat, dry, and clean.
CAUTION: To avoid damaging the components and cards, handle them by their edges, and avoid touching the
pins and the contacts.
CAUTION: You should only perform troubleshooting and repairs as authorized or directed by the Dell technical
assistance team. Damage due to servicing that is not authorized by Dell is not covered by your warranty. See the
safety instructions that is shipped with the product or at www.dell.com/regulatory_compliance.
CAUTION: Before touching anything inside your computer, ground yourself by touching an unpainted metal
surface, such as the metal at the back of the computer. While you work, periodically touch an unpainted metal
surface to dissipate static electricity which could harm internal components.
CAUTION: When you disconnect a cable, pull it by its connector or its pull tab, not the cable itself. Some cables
have connectors with locking tabs or thumbscrews that you must disengage before disconnecting the cable.
When disconnecting cables, keep them evenly aligned to avoid bending the connector pins. When connecting
cables, ensure that the ports and the connectors are correctly oriented and aligned.
CAUTION: Press and eject any installed card from the media-card reader.
CAUTION: Exercise caution when handling Lithium-ion batteries in laptops. Swollen batteries should not be used
and should be replaced and disposed properly.
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. For Windows operating system, 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.
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.
1
Working inside your computer 7
5. Remove any media card and optical disk from your computer, if applicable.
6. Enter the service mode, if you are able to power on your computer.
Service Mode
Service Mode is used to cut-off power, without disconnecting battery cable from system board prior conducting repairs in
the computer.
CAUTION: If you are unable to turn on the computer to put it into Service Mode or the computer does not
support Service Mode then proceed to disconnect the battery cable. To disconnect the battery cable, follow
the steps in Removing the battery.
NOTE: Ensure that your computer is shut down and the AC adapter is disconnected.
a. Hold <B> key on the keyboard and press the power button for 3 seconds or until the Dell logo appears on the screen.
b. Press any key to continue.
c. If the AC adapter is not disconnected, a message prompting you to remove the AC adapter appears on the screen.
Remove the AC adapter and then press any key to continue the Service Mode procedure. The Service Mode procedure
automatically skips the following step if the Owner Tag of the computer is not set up in advance by the user.
d. When the ready-to-proceed message appears on the screen, press any key to proceed. The computer emits three short
beeps and shuts down immediately.
e. Once the computer shuts down, it has successfully entered Service Mode.
NOTE: If you are unable to power on your computer or unable to enter service mode skip this process.
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 tablet 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 15 seconds should discharge residual power in the system board.
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.
8Working inside your computer
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.
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
Working inside your computer 9
●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.
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.
After working inside your computer
About this task
CAUTION: 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.
NOTE: To exit service mode, ensure to connect the AC adapter to the power-adapter port on your computer.
5. Press the power button to turn on the computer. Your computer will automatically return to normal functioning mode.
BitLocker
CAUTION: If BitLocker is not suspended before updating the BIOS, the next time you reboot the system it
will not recognize the BitLocker key. You will then be prompted to enter the recovery key to progress, and
the system will ask for this on each reboot. If the recovery key is not known this can result in data loss or
an unnecessary operating system reinstall. For more information about this subject, see Knowledge Article:
updating the BIOS on Dell systems with BitLocker enabled.
The installation of the following components triggers BitLocker:
●Hard disk drive or solid state drive
●System board
10 Working inside your computer
Removing and installing components
NOTE: The images in this document may differ from your computer depending on the configuration you ordered.
Recommended tools
The procedures in this document may require the following tools:
●Phillips screwdriver #0
●Plastic scribe
Screw list
NOTE: When removing screws from a component, it is recommended to note the screw type, the quantity of screws, and
then place them in a screw storage box. This is to ensure that the correct number of screws and correct screw type is
restored when the component is replaced.
NOTE: Some computers have magnetic surfaces. Ensure that the screws are not left attached to such surfaces when
replacing a component.
NOTE: Screw color may vary with the configuration ordered.
Table 1. Screw list
Component Screw type Quantity Screw image
Base cover Captive screws 8 N/A
Wireless card Captive screws 1 N/A
Wireless Wide Area Network
(WWAN) Card
M2x3 1
M.2 2230 solid-state drive M2x3 4
M.2 2280 solid-state drive M2x3 2
Assembly inner frame M2x3
M2x5
7
2
4-cell battery M2x3 2
Heat sink with fan assembly -
UMA
●M2x3
●M2x5 (for fan)
●4
●2●
●
Heat sink with fan assembly -
Discrete
●M2x3
●M2x5 (for fan)
●6
●2●
2
Removing and installing components 11
Table 1. Screw list (continued)
Component Screw type Quantity Screw image
●
eDP cable/bracket M2x3 2
USB Type-C support bracket M2x5 3
System board M2x3 4
Power button M2x2.5 2
Smart card reader M2x2.5 3
LED board M2x3 1
Keyboard assembly M2x2 18
Keyboard bracket M2x2 5
Display assembly M2.5x5 (display hinges to
palm-rest assembly)
4
Display hinge M2.5x3 (display hinges to
display back cover)
4
Display panel M2.5x3 2
Major components of Latitude 5431
The following image shows the major components of Latitude 5431.
12 Removing and installing components
1. Base cover 2. Battery
3. Speakers 4. Memory module
5. Assembly inner frame 6. System board
7. Keyboard assembly 8. Palm-rest assembly
Removing and installing components 13
9. Display assembly 10. Battery LED board
11. Coin-cell battery 12. Power button/fingerprint board
13. Heat sink and fan assembly 14. Solid-state drive
15. WWAN card 16. WLAN card
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.
SIM card
Removing the SIM card
Prerequisites
1. Follow the procedure in Before working inside your computer.
NOTE: SIM card or SIM tray removal is only available on systems that are shipped with WWAN module. The procedure for
removal is only applicable for systems that are shipped with a WWAN module.
CAUTION: Removing the SIM card with the computer turned on, may cause data loss or damage to the card.
Ensure that your computer is turned off or the network connections are disabled.
About this task
The following image provides a visual representation of the SIM card removal procedure.
14 Removing and installing components
Steps
1. Insert a pin into the release hole of the SIM tray and push inward until the tray is released.
2. Slide the SIM tray out of the slot on the computer.
3. Remove the SIM card from the SIM tray.
4. Slide the SIM card tray into the slot, until it clicks into place.
Installing the SIM card
Prerequisites
If you are replacing a component, remove the existing component before the installation procedure.
NOTE: SIM card or SIM tray removal is only available on systems that are shipped with WWAN module. Hence, removing
procedure is only applicable for systems that are shipped with WWAN module.
About this task
The following image indicates the location of the SIM card and provides a visual representation of the installation procedure.
Removing and installing components 15
Steps
1. Insert a pin into the hole of the SIM tray and push inward until the tray is released.
2. Slide the SIM card tray out of the slot on the computer.
3. Place the SIM card into the SIM tray with the metallic contact facing up.
4. Align the SIM tray with the slot on the computer and carefully slide it in.
5. Slide the SIM tray into the slot, until it clicks into place.
Next steps
1. Follow the procedure in After working inside your computer.
16 Removing and installing components
Micro Secure Digital (SD) Card
Removing the microSD card
Prerequisites
1. Follow the procedure in Before working inside your computer.
About this task
The following images indicate the location of the microSD card and provide a visual representation of the removal procedure.
Steps
1. Push the microSD card to release it from the computer.
2. Slide the microSD card out of the computer.
Installing the microSD card
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
About this task
The following images indicate the location of the microSD card and provides a visual representation of the installation procedure.
Removing and installing components 17
Steps
1. Align the microSD card to its slot on the computer.
2. Slide the microSD card into the slot until it clicks into place.
Next steps
1. Follow the procedure in After working inside your computer.
Base cover
Removing the base cover
Prerequisites
1. Follow the procedure in Before working inside your computer.
2. Remove the microSD card.
About this task
The following images indicate the location of the base cover and provide a visual representation of the removal procedure.
18 Removing and installing components
Removing and installing components 19
Steps
1. Loosen the eight captive screws that secure the base cover to the palm-rest and keyboard assembly.
2. Using the flat-end of plastic scribe, pry the base cover from the U-shaped indents at the top edge of the base cover and
continue to work on the sides to release the base cover from the palm-rest and keyboard assembly.
3. Lift the base cover off the palm-rest and keyboard assembly.
Installing the base cover
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
About this task
The following images indicate the location of the base cover and provide a visual representation of the installation procedure.
20 Removing and installing components
Steps
1. Align the screw holes on the base cover with the screw holes on the palm-rest assembly and keyboard assembly, and then
snap the base cover into place.
2. Tighten the eight captive screws that secure the base cover to the palm-rest and keyboard assembly.
Next steps
1. Install the microSD card.
2. Follow the procedure in After working inside your computer.
Wireless card
Removing the wireless card
Prerequisites
1. Follow the procedure in Before working inside your computer.
2. Remove the SIM card.
3. Remove the microSD card.
4. Remove the base cover.
About this task
The following images indicate the location of the wireless card and provide a visual representation of the removal procedure.
Removing and installing components 21
22 Removing and installing components
Steps
1. NOTE: When removing the wireless card from the computer, if the adhesive pad which helps secure the wireless
card in place is removed from the computer along with the WLAN card, adhere it back to the computer.
Loosen the single (M2x3.5) screw that secures the wireless-card bracket to the wireless card and system board.
2. Remove the wireless-card bracket from the wireless card.
3. Disconnect the antenna cables from the wireless card.
4. Slide and remove the wireless card from the wireless-card slot.
Installing the wireless card
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
About this task
The following image indicate the location of the wireless card and provides a visual representation of the installation procedure.
Removing and installing components 23
Steps
1. Connect the antenna cables to the wireless card.
The following table provides the antenna-cable color scheme:
Table 2. Antenna-cable color scheme
Connectors on the
wireless card
Antenna-cable color Silkscreen marking
Main White MAIN △ (white triangle)
Auxiliary Black AUX ▲ (black triangle)
2. Align the notch on the wireless card with the tab on the wireless-card slot on the system board.
3. Slide and insert the wireless card at an angle into the wireless-card slot on the system board.
4. Align the screw hole on the wireless-card bracket to the screw hole on the wireless card and system board.
5. Tighten the single (M2x3.5) screw that secures the wireless-card bracket to the wireless card and the system board.
Next steps
1. Install the microSD card.
2. Install the SIM card.
3. Install the base cover.
4. Follow the procedure in After working inside your computer.
24 Removing and installing components
Wireless Wide Area Network (WWAN) Card
Removing the WWAN card
Prerequisites
1. Follow the procedure in Before working inside your computer.
2. Remove the SIM card.
3. Remove the microSD card.
4. Remove the base cover.
About this task
The following image indicates the location of the WWAN card and provide a visual representation of the removal procedure.
Steps
1. Remove the single (M2x3) screw that secures the WWAN-card bracket to the WWAN card.
2. Slide and remove the WWAN card bracket off the WWAN card.
3. Disconnect the antenna cables from the connectors on the WWAN card.
4. Slide and remove the WWAN card from the WWAN card slot.
Removing and installing components 25
Installing the WWAN card
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
About this task
The following image indicates the location of the WWAN card and provides a visual representation of the installation procedure.
Steps
1. Connect the antenna cables to the WWAN card.
The following table provides the antenna-cable color scheme:
Table 3. Antenna-cable color scheme
Connectors on the
wireless card
Antenna-cable color Silkscreen marking
Main White MAIN △ (white triangle)
Auxiliary Black AUX ▲ (black triangle)
2. Align the notch on the WWAN card with the tab on the WWAN slot.
3. Slide the WWAN card at an angle into the WWAN slot.
4. Replace the single screw (M2x3) to secure the WWAN-card bracket to the WWAN card.
26 Removing and installing components
NOTE: For instructions on how to find your computer's IMEI (International Mobile Station Equipment Identity) number,
see the knowledge base article 000143678 at www.dell.com/support.
Next steps
1. Install the microSD card.
2. Install the SIM card.
3. Install the base cover.
4. Follow the procedure in After working inside your computer.
Solid-state drives
Removing the 2230 solid-state drive
Prerequisites
1. Follow the procedure in Before working inside your computer.
NOTE: Solid-state drives are fragile. Exercise care when handling the solid-state drive.
NOTE: To avoid data loss, do not remove the solid-state drive while the computer is in sleep or on state.
2. Remove the SIM card.
3. Remove the microSD card.
4. Remove the base cover.
About this task
NOTE: Depending on the configuration ordered, your computer may support a 2230 solid-state drive, or a 2280 solid-state
drive in M.2 slot.
NOTE: This procedure applies only to computers shipped with a 2230 solid-state drive installed in M.2 slot.
The following image indicates the location of the 2230 solid-state drive that is installed and provides a visual representation of
the removal procedure.
Removing and installing components 27
Steps
1. Remove the two (M2x3) screws that secures the thermal plate to the palm-rest assembly.
2. Remove the single (M2x3) screw securing the solid-state drive assembly in place.
3. Slide and remove the solid-state drive assembly from the computer.
4. Remove the single (M2x3) screw securing the solid-state drive bracket in place.
5. Slide and remove the solid-state drive bracket out of the computer.
6. Slide and remove the solid-state drive from the M.2 slot.
Installing the 2230 solid-state drive
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
About this task
NOTE: Solid-state drives are fragile. Exercise care when handling the solid-state drive.
NOTE: Depending on the configuration ordered, your computer may support a 2230 solid-state drive, or a 2280 solid-state
drive in M.2 slot.
28 Removing and installing components
NOTE: This procedure applies only if you are installing a 2230 solid-state drive in M.2 slot. When you install the M.2 2230
solid-state drive after purcharse, you must purchase a customer kit that includes holder and a screw to install the M.2 2230
solid-state drive,
The following images indicate the location of the 2230 solid-state drive and provides a visual representation of the installation
procedure.
Steps
1. Align the notch on the M.2 2230 solid-state drive with the tab on the solid-state drive slot.
2. Slide the M.2 2230 solid-state drive into the solid-state drive slot on the system board
3. Replace the single screw (M2x3) that secures the solid-state drive to the holder and system board.
NOTE: If the computer is not shipped with a M.2 2230 solid-state drive, you must obtain a customer kit that includes
holder and a screw to install the M.2 2230 solid-state drive.
4. Align and place the solid-state drive thermal plate on the 2230 solid-state drive slot.
5. Replace the two screws (M2x3) that secure the solid-state drive thermal plate to the palm-rest and keyboard assembly.
Next steps
1. Install the microSD card.
2. Install the SIM card.
3. Install the base cover.
4. Follow the procedure in After working inside your computer.
Removing and installing components 29
Removing the 2280 solid-state drive
Prerequisites
1. Follow the procedure in Before working inside your computer.
NOTE: Solid-state drives are fragile. Exercise care when handling the solid-state drive.
NOTE: To avoid data loss, do not remove the solid-state drive while the computer is in sleep or on state.
2. Remove the SIM card.
3. Remove the microSD card.
4. Remove the base cover.
About this task
NOTE: Depending on the configuration ordered, your computer may support a 2280 solid-state drive, or a 2230 solid-state
drive in M.2 slot.
NOTE: This procedure applies only to computers shipped with a 2280 solid-state drive installed in M.2 slot.
The following image indicates the location of the 2280 solid-state drive that is installed in M.2 slot and provides a visual
representation of the removal procedure.
Steps
1. Remove the two screws (M2x3) that secure the solid-state drive thermal plate to the palm-rest and keyboard assembly.
2. Remove the solid-state drive thermal plate out of the computer.
3. Slide and remove the 2280 solid-state drive from the M.2 solid-state drive slot on the system board.
Installing the 2280 solid-state drive
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
30 Removing and installing components
About this task
NOTE: Solid-state drives are fragile. Exercise care when handling the solid-state drive.
NOTE: Depending on the configuration ordered, the computer one may support a 2280 solid-state drive, or a 2230
solid-state drive in M.2 slot.
NOTE: This procedure is applicable if you are installing a 2280 solid-state drive in M.2 slot.
The following images indicate the location of the 2280 solid-state drive that is installed in M.2 slot and provides a visual
representation of the installation procedure.
Steps
1. Align the notch on the M.2 2280 solid-state drive with the tab on the M.2 solid-state drive slot.
2. Slide the M.2 2280 solid-state drive into the M.2 solid-state drive slot on the system board.
3. Place the solid-state drive thermal plate over the solid-state drive.
4. Align the screw holes on the solid-state drive and thermal plate with the screw hole on the palm-rest and keyboard
assembly.
5. Replace the two screws (M2x3) that secure the 2280 solid-state drive and thermal plate to the palm-rest and keyboard
assembly.
Next steps
1. Install the microSD card.
2. Install the SIM card.
3. Install the base cover.
4. Follow the procedure in After working inside your computer.
Removing and installing components 31
Memory
Removing the memory modules
Prerequisites
1. Follow the procedure in Before working inside your computer.
2. Remove the SIM card.
3. Remove the microSD card.
4. Remove the base cover.
About this task
NOTE: The system supports two memory slots.
The following image indicates the location of the memory module and provides a visual representation of the removal procedure.
Steps
1. Using your fingertips, spread apart the securing clips on the memory-module slot until the memory module pops up.
2. Slide and remove the memory module from the memory-module slot.
NOTE: Repeat step 1 to step 2 to remove any other memory modules installed in your computer.
Installing the memory module
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
About this task
NOTE: The system supports two memory slots.
32 Removing and installing components
The following images indicate the location of the memory module and provide a visual representation of the installation
procedure.
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 and press the memory module down until it clicks into place.
NOTE: If you do not hear the click, remove the memory module and reinstall it.
NOTE: Repeat step 1 to step 4 to install any other memory modules in your computer.
Next steps
1. Install the microSD card.
2. Install the SIM card.
3. Install the base cover.
4. Follow the procedure in After working inside your computer.
Battery
Lithium-ion battery precautions
CAUTION:
●Exercise caution when handling Lithium-ion batteries.
●Discharge the battery 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.
Removing and installing components 33
●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.
●Swollen batteries should not be used and should be replaced and disposed properly. For guidelines on how to
handle and replace swollen Lithium-ion batteries, see Handling swollen Lithium-ion batteries.
Removing the 4-cell battery
Prerequisites
1. Follow the procedure inBefore working inside your computer.
2. Remove the SIM card.
3. Remove the microSD card.
4. Remove the base cover.
About this task
The following images indicate the location of the 4-cell (64 Wh) battery and provides a visual representation of the removal
procedure.
Steps
1. Disconnect the battery cable from the connector on the system board, if it was not disconnected earlier.
2. Remove the two screws (M2x3) that secure the 4-cell battery to the palm-rest and keyboard assembly.
3. Lift the 4-cell battery, along with its cable, off the palm-rest and keyboard assembly.
34 Removing and installing components
Installing the 4-cell battery
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
About this task
The following images indicate the location of the 4-cell (64 Wh) battery and provide a visual representation of the installation
procedure.
Steps
1. Align the screw holes on the 4-cell battery with the screw holes on the palm-rest and keyboard assembly.
2. Replace the two screws (M2x3) that secure the 4-cell battery to the palm-rest and keyboard assembly.
3. Connect the battery cable to the connector on the system board.
Next steps
1. Install the microSD card.
2. Install the SIM card.
3. Install the base cover.
4. Follow the procedure in After working inside your computer.
Battery cable
Removing the 4-cell battery cable
Prerequisites
1. Follow the procedure in Before working inside your computer.
2. Remove the SIM card.
3. Remove the microSD card.
4. Remove the base cover.
Removing and installing components 35
5. Remove the battery.
NOTE: If battery is disconnected from system board for service, then there is a delay during system boot as the system
undergoes RTC battery reset.
About this task
The following images indicate the location of the battery cable and provide a visual representation of the removal procedure.
Steps
1. Flip the battery and unroute the battery cable from the routing guides on the battery.
2. Disconnect the battery cable from the connector on the battery.
3. Lift the battery cable away from the battery.
Installing the 4-cell battery cable
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
About this task
The following images indicate the location of the battery cable and provide a visual representation of the installation procedure.
36 Removing and installing components
Steps
1. Connect the battery cable to the connector on the battery.
2. Route the battery cable through the routing guides on the battery.
Next steps
1. Install the battery.
2. Install the microSD card.
3. Install the SIM card.
4. Install the base cover.
5. Follow the procedure in After working inside your computer.
Assembly inner frame
Removing the assembly inner frame
Prerequisites
1. Follow the procedure in Before working inside your computer.
2. Remove the SIM card.
3. Remove the microSD card.
4. Remove the base cover.
5. Remove the battery.
6. Remove the wireless card.
7. Remove the WWAN card.
About this task
The following images indicate the location of the assembly inner frame and provide a visual representation of the removal
procedure.
Removing and installing components 37
Steps
1. Unroute the antenna cables from the routing guides on the assembly inner frame.
2. Remove the two screws (M2x5) and seven screws (M2x3) that secure the assembly inner frame to the system board and
the palm-rest assembly.
3. Lift the assembly inner frame off the system board and the palm-rest assembly.
38 Removing and installing components
Installing the assembly inner frame
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
About this task
The following image indicates the location of the assembly inner frame and provides a visual representation of the installation
procedure.
Removing and installing components 39
Steps
1. Align the screw holes on the assembly inner frame with the screw holes on the system board and the palm-rest assembly.
NOTE: Ensure that the tab on the top-left corner of the assembly inner frame is installed underneath the tab on the
palm-rest assembly.
Inner Frame
palm-rest assembly
2. Replace the two screws (M2x5) and seven screws (M2x3) that secure the assembly inner frame to the system board and
the palm-rest assembly.
3. Align and place the fingerprint bracket on the assembly inner frame.
4. Route the antennas cable through the routing guides on the assembly inner frame.
40 Removing and installing components
Next steps
1. Install the battery.
2. Install the WWAN card.
3. Install the wireless card.
4. Install the base cover.
5. Install the microSD card.
6. Install the SIM card.
7. Follow the procedure in After working inside your computer.
LED board
Removing the LED board
Prerequisites
1. Follow the procedure in Before working inside your computer.
2. Remove the SIM card.
3. Remove the microSD card.
4. Remove the base cover.
5. Remove the 2280 solid-state drive or 2230 solid-state drive.
6. Remove the battery.
7. Remove the wireless card.
8. Remove the WWAN card.
9. Remove the assembly inner frame.
About this task
The following image indicates the location of the LED board and provides a visual representation of the removal procedure.
Steps
1. Disconnect the LED-board cable from the connector on the system board.
Removing and installing components 41
2. Peel the LED-board cable from the computer.
3. Remove the single screw (M2x3) that secures the LED board to the palm-rest assembly.
4. Lift the LED board and cable away from the palm-rest assembly.
Installing the LED board
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
About this task
The following images indicate the location of the LED board and provide a visual representation of the installation procedure.
Steps
1. Align the screw hole on the LED board with the screw hole on the palm-rest assembly.
2. Replace the single screw (M2x3) to secure the LED board to the palm-rest assembly.
3. Route the LED-board cable and connect the cable to the connector on the system board.
CAUTION: Do not route the LED-board cable under the coin-cell battery. Incorrect routing of the LED-board
cable may damage the LED board, LED-board cable, and system board.
Next steps
1. Install the assembly inner frame.
2. Install the battery.
3. Install the WWAN card.
4. Install the wireless card.
5. Install the 2280 solid-state drive or 2230 solid-state drive.
6. Install the base cover.
7. Install the microSD card.
8. Install the SIM card.
9. Follow the procedure in After working inside your computer.
42 Removing and installing components
Heat sink
Removing the heat sink and fan assembly - UMA
Prerequisites
1. Follow the procedure in Before working inside your computer.
2. Remove the SIM card.
3. Remove the microSD card.
4. Remove the base cover.
About this task
The following images indicate the location of the heat sink and fan assembly and provide a visual representation of the removal
procedure.
Steps
1. Disconnect the system fan cable from the connector on the system board.
2. Remove the two screws (M2x5) that secure the system fan to the system board.
3. In reverse sequential order (as indicated on the heat sink), loosen the four screws (M2x3) that secure the heat sink and fan
assembly to the system board.
4. Lift the heat sink and fan assembly off the system board.
NOTE: Do not damage the thermal fan sponge during any replacement procedures. Damaging this sponge reduces the
effectiveness of the heat dispersion.
Removing and installing components 43
Installing the heat sink and fan assembly - UMA
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
CAUTION: Incorrect alignment of the heat sink can damage the system board and processor.
NOTE: If either the system board or the heat sink is replaced, use the thermal pad/paste provided in the kit to ensure that
thermal conductivity is achieved.
About this task
The following images indicate the location of the heat sink and fan assembly and provide a visual representation of the
installation procedure.
44 Removing and installing components
Steps
1. Align the screw holes on the heat sink and fan assembly with the screw holes on the system board.
2. In sequential order (as indicated on the heat sink), tighten the four screws (M2x3) that secure the heat sink and fan
assembly to the system board.
3. Replace the two screws (M2x5) that secure the system fan to the frame.
4. Connect the system fan cable to the connector on the system board.
Next steps
1. Install the base cover.
2. Install the microSD card.
3. Install the SIM card.
4. Follow the procedure in After working inside your computer.
Removing the heat sink and fan assembly—discrete
Prerequisites
1. Follow the procedure in Before working inside your computer.
2. Remove the SIM card.
3. Remove the microSD card.
4. Remove the base cover.
About this task
The following images indicate the location of the heat sink and fan assembly and provide a visual representation of the removal
procedure.
Removing and installing components 45
Steps
1. Disconnect the system fan cable from the connector on the system board.
2. Remove the two screws (M2x5) that secure the system fan to the system board.
3. In reverse sequential order (as indicated on the heat sink), loosen the six screws (M2x3) that secure the heat sink and fan
assembly to the system board.
4. Lift the heat sink and fan assembly off the system board.
NOTE: Do not damage the thermal fan sponge during any replacement procedures. Damaging this sponge reduces the
effectiveness of the heat dispersion.
46 Removing and installing components
Installing the heat sink and fan assembly—discrete
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
CAUTION: Incorrect alignment of the heat sink can damage the system board and processor.
NOTE: If either the system board or the heat sink is replaced, use the thermal pad/paste provided in the kit to ensure that
thermal conductivity is achieved.
About this task
The following images indicate the location of the heat sink and fan assembly and provide a visual representation of the
installation procedure.
Steps
1. Align the screw holes on the heat sink and fan assembly with the screw holes on the system board.
2. In sequential order (as indicated on the heat sink), tighten the six screws (M2x3) that secure the heat sink and fan assembly
to the system board.
3. Replace the two screws (M2x5) that secure the system fan to the frame.
4. Connect the system fan cable to the connector on the system board.
Next steps
1. Install the base cover.
2. Install the microSD card.
3. Install the SIM card.
4. Follow the procedure in After working inside your computer.
Removing and installing components 47
Speakers
Removing the speakers
Prerequisites
1. Follow the procedure in Before working inside your computer.
2. Remove the SIM card.
3. Remove the microSD card.
4. Remove the base cover.
5. Remove the battery.
6. Remove the assembly inner frame.
About this task
The following image indicates the location of the speakers and provide a visual representation of the removal procedure.
Steps
1. Disconnect the speaker cable from the connector on the system board.
2. Peel the tape that secures the speaker cable to the palm-rest and keyboard assembly.
3. Note the speaker cable routing, and unroute the speaker cable from the routing guides on the palm-rest and keyboard
assembly.
4. Lift the speakers, along with the cable, off the palm-rest and keyboard assembly.
Installing the speakers
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
About this task
The following image indicates the location of the speaker and provides a visual representation of the installation procedure.
48 Removing and installing components
Steps
1. Using the alignment posts and rubber grommets, place the speakers on the slots of the palm-rest and keyboard assembly.
NOTE: Replace the cushion rubbers if any one of the cushion rubber is separated from the speakers.
2. Route the speaker cable through the bottom-left corner of the system and ensure that the speaker cables are routed firmly
into the routing guides on the palm-rest and keyboard assembly.
3. Connect the speaker cable to the connector on the system board.
NOTE: When routing the speaker cable, route the cables into the channels on the inner frame.
Removing and installing components 49
Next steps
1. Install the assembly inner frame.
2. Install the battery.
3. Install the base cover.
4. Install the microSD card.
5. Install the SIM card.
6. Follow the procedure in After working inside your computer.
System board
Removing the system board
Prerequisites
1. Follow the procedure in Before working inside your computer.
2. Remove the SIM card.
3. Remove the microSD card.
4. Remove the base cover.
5. Remove the 2280 solid-state drive or 2230 solid-state drive.
6. Remove the battery.
7. Remove the wireless card.
8. Remove the WWAN card.
9. Remove the assembly inner frame.
10. Remove the heat sink.
About this task
The following image indicates the connectors on your system board.
Figure 1. System board connectors
50 Removing and installing components
1. Fingerprint reader connector
2. WWAN connector
3. Camera/IR cable connector
4. eDP/display cable connector
5. Touch and sensor cable connector
6. Fan connector
7. Memory modules
8. Battery cable connector
9. Touchpad cable connector
10. USH board connector
11. WLAN connector
12. Solid-state drive slot
13. Coin-cell battery cable connector
14. Speaker cable connector
15. Battery LED cable connector
The following images indicate the location of the system board and provide a visual representation of the removal procedure.
Removing and installing components 51
52 Removing and installing components
Steps
NOTE: For the models shipped with a fingerprint reader, disconnect the fingerprint reader cable from the connector on the
system board before removing the system board from the palm-rest assembly and keyboard assembly.
NOTE: When removing the system board to replace/access other parts, the system board can be removed and installed
with the thermal assembly attached to simplify the procedure and preserve the thermal bond between the system board
and heat-sink. To do so, you must also remove the two (M2x5) screws securing the fan to the palm-rest assembly.
Removing and installing components 53
1. Remove the two (M2x3) screws that secure the eDP/display cable bracket to the system board.
2. Lift the eDP/display cable bracket away from the system.
3. Peel the tape that secures the display cable to the system board.
4. Using the pull tab, disconnect the display cable from the connector on the system board.
5. Disconnect IR camera cable from the connector on the system board (for models shipped with an IR camera).
6. Disconnect the touch screen cable from the connector on the system board (for models shipped with a touch screen).
7. Open the latch and disconnect the USH board cable from the connector on the system board.
8. Open the latch and disconnect the touchpad cable from the connector on the system board.
9. Open the latch and disconnect the LED cable from the connector on the system board.
10. Disconnect the coin-cell battery cable from the connecter on the system board.
NOTE: When you disconnect the coin-cell battery cable from the connecter on the system board, the CMOS setting is
cleared.
11. Remove the three (M2x5) screws that secure the USB Type-C bracket to the system board.
12. Lift off the USB Type-C bracket off the system board.
13. Remove the four (M2x3) screws that secure the system board to the palm-rest assembly and keyboard assembly.
14. Lift the system board off the palm-rest assembly and keyboard assembly.
Installing the system board
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
About this task
The following images indicate the location of the system board and provide a visual representation of the installation procedure.
54 Removing and installing components
Removing and installing components 55
Steps
NOTE: The system board can be removed and installed with the thermal module attached in order to simplify the procedure
and preserve the thermal bond between the system board and heat-sink. In order to do so, technicians must also remove
the two (M2x5) screws the secure the system fan to the system board.
1. Slide the system board to make the USB Type-C connector to toe-in to the hinge saddle and align the screw holes on the
system board with the screw holes on the palm-rest assembly and keyboard assembly.
2. Replace the four (M2x3) screws to secure the system board to the palm-rest assembly and keyboard assembly.
3. Align and place the USB Type-C bracket on the system board.
4. Replace the three (M2x5) screws that secure the USB Type-C bracket to the system board.
5. Route the coin-cell battery cable under the system board and connect the coin-cell battery cable to the connector on the
system board.
56 Removing and installing components
6. Connect the touchpad cable to the system board and close the latch to secure the cable to the system board.
7. Connect the USH board cable to the system board and close the latch to secure the cable to the system board.
8. Connect the touch screen cable from the connector on the system board (for models shipped with a touch screen).
9. Connect IR camera cable from the connector on the system board (for models shipped with an IR camera).
10. Route the display and eDP/display cable through the routing guide on the system board.
11. Connect the eDP/display cable to the connector on the system board.
12. Connect the display cable to the connector on the system board.
13. Adhere the tape that secures the display cable to the system board.
14. Align the screw holes on the eDP/display cable bracket with the screw holes on the system board.
15. Replace the two (M2x3) screws that secure the eDP/display cable bracket to the system board.
Next steps
1. Install the heat sink.
2. Install the assembly inner frame.
3. Install the battery.
4. Install the WWAN card.
5. Install the wireless card.
6. Install the 2280 solid-state drive or 2230 solid-state drive.
7. Install the base cover.
8. Install the microSD card.
9. Install the SIM card.
10. Follow the procedure in After working inside your computer.
Power button with fingerprint reader
Removing the power button
Prerequisites
1. Follow the procedure in Before working inside your computer.
2. Remove the SIM card.
3. Remove the microSD card.
4. Remove the base cover.
5. Remove the 2280 solid-state drive or 2230 solid-state drive.
6. Remove the memory modules.
7. Remove the battery.
8. Remove the wireless card.
9. Remove the WWAN card.
10. Remove the heat sink heat sink.
11. Remove the assembly inner frame.
12. Remove the system board.
NOTE: The system board can be removed with the heat sink attached in order to simplify the procedure and preserve
the thermal bond between the system board and heat sink.
About this task
The following image indicates the location of the power-button board and provide a visual representation of the removal
procedure.
Removing and installing components 57
Steps
1. Remove the two screws (M2x2.5) that secure the power-button board to the palm-rest assembly.
NOTE: The removal of two screws applies to both models with and without the fingerprint reader.
2. Lift the power-button board off the palm-rest assembly.
For models shipped with a fingerprint reader, make sure to disconnect the fingerprint reader FPC from the system board
before removing the system board.
58 Removing and installing components
Installing the power button
About this task
The following image indicates the location of the power-button board and provide a visual representation of the installation
procedure.
Steps
1. Align and place the power-button board on the palm-rest assembly.
2. Replace the two (M2x2.5) screws that secure the power-button board to the palm-rest assembly.
NOTE: This step applies to both models with and without the fingerprint reader.
Next steps
1. Install the system board.
2. Install the heat sink.
3. Install the assembly inner frame.
4. Install the battery.
5. Install the memory modules.
6. Install the WWAN card.
7. Install the wireless card.
8. Install the 2280 solid-state drive or 2230 solid-state drive.
9. Install the base cover.
10. Install the microSD card.
11. Install the SIM card.
12. Follow the procedure in After working inside your computer.
Removing and installing components 59
Smart card reader
Removing the smart card reader
Prerequisites
1. Follow the procedure in Before working inside your computer.
2. Remove the SIM card.
3. Remove the microSD card.
4. Remove the base cover.
5. Remove the 2280 solid-state drive or 2230 solid-state drive.
6. Remove the battery.
7. Remove the wireless card.
8. Remove the WWAN card.
9. Remove the assembly inner frame.
About this task
The following images indicate the location of the smart card reader and provide a visual representation of the removal
procedure.
60 Removing and installing components
Steps
1. Open the latch and disconnect the smart card reader cable from the connector on the USH board.
2. Remove the three screws (M2x2.5) that secure the smart card reader to the palm-rest assembly.
3. Lift the smart card reader off the palm-rest assembly.
Installing the smart card reader
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
About this task
The following images indicate the location of the smart card reader and provide a visual representation of the installation
procedure.
Steps
1. Align and place the smart card reader on the palm-rest assembly.
2. Replace the three screws (M2x2.5) that secure the smart card reader to the palm-rest assembly.
3. Connect the smart card reader cable to the connector on the USH board.
Removing and installing components 61
Next steps
1. Install the assembly inner frame.
2. Install the battery.
3. Install the WWAN card.
4. Install the wireless card.
5. Install the 2280 solid-state drive or 2230 solid-state drive.
6. Install the base cover.
7. Install the microSD card.
8. Install the SIM card.
9. Follow the procedure in After working inside your computer.
Coin-cell battery
Removing the coin-cell battery
Prerequisites
1. Follow the procedure in Before working inside your computer.
CAUTION: Removing the coin-cell battery resets the BIOS setup program’s settings to default. It is
recommended that you note the BIOS setup program’s settings before removing the coin-cell battery.
2. Remove the SIM card.
3. Remove the microSD card.
4. Remove the base cover.
5. Remove the 2280 solid-state drive or 2230 solid-state drive.
6. Remove the battery.
7. Remove the wireless card.
8. Remove the WWAN card.
9. Remove the assembly inner frame.
About this task
The following image indicates the location of the coin-cell battery and provides a visual representation of the removal procedure.
62 Removing and installing components
Steps
Pry and remove the coin-cell battery from the palm-rest assembly.
Installing the coin-cell battery
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
About this task
The following image indicates the location of the coin-cell battery and provides a visual representation of the installation
procedure.
Steps
Adhere the coin-cell battery to the slot on the palm-rest assembly.
Next steps
1. Install the assembly inner frame.
2. Install the battery.
3. Install the WWAN card.
4. Install the wireless card.
5. Install the 2280 solid-state drive or 2230 solid-state drive.
6. Install the base cover.
7. Install the microSD card.
8. Install the SIM card.
9. Follow the procedure in After working inside your computer.
Removing and installing components 63
Keyboard assembly
Removing the keyboard assembly
Prerequisites
1. Follow the procedure in Before working inside your computer.
2. Remove the SIM card.
3. Remove the microSD card.
4. Remove the base cover.
5. Remove the 2280 solid-state drive or 2230 solid-state drive.
6. Remove the battery.
7. Remove the wireless card.
8. Remove the WWAN card.
9. Remove the heat sink heat sink.
10. Remove the assembly inner frame.
11. Remove the system board.
NOTE: The system board can be removed with the heat sink attached in order to simplify the procedure and preserve
the thermal bond between the system board and heat sink.
About this task
The following images indicate the location of the keyboard assembly and provide a visual representation of the removal
procedure.
64 Removing and installing components
Steps
1. NOTE: For models shipped with a USH module, disconnect the USH cable from the keyboard bracket.
Lift the latch and disconnect the keyboard cable and keyboard backlit cable (for models that are shipped with the keyboard
backlight) from the touchpad.
2. Remove the sixteen (M2x2) screws that secure the keyboard assembly to the palm-rest.
3. Carefully lift the keyboard assembly from the palm-rest.
4. Remove the keyboard assembly off the palm-rest assembly.
Installing the keyboard assembly
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
About this task
NOTE: The system board can be installed with the heat sink attached in order to simplify the procedure and preserve the
thermal bond between the system board and heat sink.
Removing and installing components 65
The following images indicate the location of the keyboard assembly and provide a visual representation of the installation
procedure.
Steps
1. Align and place the keyboard assembly on the palm-rest assembly.
2. Replace the sixteen (M2x2) screws that secure the keyboard assembly to the palm-rest.
3. Connect the keyboard cable and keyboard backlit cable to its connectors on the touchpad.
NOTE: For models shipped with a USH module, connect the USH cable to the keyboard bracket.
Next steps
1. Install the system board.
2. Install the heat sink.
3. Install the assembly inner frame.
4. Install the battery.
5. Install the WWAN card.
6. Install the wireless card.
7. Install the 2280 solid-state drive or 2230 solid-state drive.
8. Install the base cover.
66 Removing and installing components
9. Install the microSD card.
10. Install the SIM card.
11. Follow the procedure in After working inside your computer.
Keyboard bracket
Removing the keyboard bracket
Prerequisites
1. Follow the procedure in Before working inside your computer.
2. Remove the SIM card.
3. Remove the microSD card.
4. Remove the base cover.
5. Remove the 2280 solid-state drive or 2230 solid-state drive.
6. Remove the memory modules.
7. Remove the battery.
8. Remove the wireless card.
9. Remove the WWAN card.
10. Remove the heat sink heat sink.
11. Remove the assembly inner frame.
12. Remove the system board.
NOTE: The system board can be removed with the heat sink attached in order to simplify the procedure and preserve
the thermal bond between the system board and heat sink.
13. Remove the Keyboard assembly.
About this task
The following images indicate the location of the keyboard bracket and provide a visual representation of the removal procedure.
Removing and installing components 67
Steps
1. Remove the five (M2x2) screws that secure the keyboard to the keyboard bracket.
2. Remove the keyboard from the keyboard bracket.
Installing the keyboard bracket
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
About this task
NOTE: The system board can be installed with the heat sink attached in order to simplify the procedure and preserve the
thermal bond between the system board and heat sink.
The following image indicates the location of the keyboard bracket and provides a visual representation of the installation
procedure.
68 Removing and installing components
Steps
1. Align and place the keyboard on the keyboard bracket.
2. Replace the five (M2x2) screws to secure the keyboard to the keyboard bracket.
Removing and installing components 69
Next steps
1. Install the keyboard assembly.
2. Install the system board.
3. Install the heat sink.
4. Install the assembly inner frame.
5. Install the battery.
6. Install the memory modules.
7. Install the WWAN card.
8. Install the wireless card.
9. Install the 2280 solid-state drive or 2230 solid-state drive.
10. Install the base cover.
11. Install the microSD card.
12. Install the SIM card.
13. Follow the procedure in After working inside your computer.
Display assembly
Removing the display assembly
Prerequisites
1. Follow the procedure in Before working inside your computer.
2. Remove the SIM card.
3. Remove the microSD card.
4. Remove the base cover.
5. Remove the wireless card.
6. Remove the WWAN card.
About this task
The following images indicate the location of the display assembly and provide a visual representation of the removal procedure.
70 Removing and installing components
Removing and installing components 71
Steps
1. Remove the two (M2x3) screws that secure the eDP cable bracket to the system board.
2. Lift the eDP cable bracket away from the system.
3. Peel the tape that secures the display cable to the system board.
4. Using the pull tab, disconnect the display cable from the connector on the system board.
5. Disconnect the eDP cable from the connector on the system board and unroute it from the routing guide.
6. Disconnect the IR camera cable from its connector on the system board (for models shipped with an IR camera).
7. Disconnect the touchscreen cable from its connector on the system board (for models shipped with a touchscreen).
8. Peel the adhesive tape partially and unroute the WLAN antenna cables from the routing guides on the system board.
9. Remove the four (M2.5x5) screws that secure the display hinges to the system board.
10. Open the display hinges at an angle of 90 degrees.
11. Remove the display assembly from the system.
Installing the display assembly
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
About this task
The following images indicate the location of the display assembly and provide a visual representation of the installation
procedure.
72 Removing and installing components
Removing and installing components 73
74 Removing and installing components
Steps
1. Place the display assembly on the system. Align the screw holes on the display hinges with screw holes on the palm-rest
assembly.
2. Replace the four (M2.5x5) screws that secure the display hinges to the palm-rest assembly.
3. Close the display.
4. Route the WLAN antenna cables through the routing guide and adhere the tape to secure the cables to the system board.
5. Route the display and eDP cable through the routing guide on the system board.
6. Connect the eDP cable to the connector on the system board.
7. Connect the display cable to the connector on the system board.
8. Adhere the tape that secures the display cable to the system board.
9. Connect the IR camera cable from its connector on the system board (for models shipped with an IR camera).
10. Connect the touch screen cable from its connector on the system board (for models shipped with a touch screen).
11. Align the screw holes on the eDP cable bracket with the screw holes on the system board.
12. Replace the two screws (M2x3) that secure the eDP cable bracket to the system board.
Removing and installing components 75
Next steps
1. Install the WWAN card.
2. Install the wireless card.
3. Install the base cover.
4. Install the microSD card.
5. Install the SIM card.
6. Follow the procedure in After working inside your computer.
Display bezel
Removing the display bezel
Prerequisites
1. Follow the procedure in Before working inside your computer.
2. Remove the SIM card.
3. Remove the microSD card.
4. Remove the base cover.
5. Remove the wireless card.
6. Remove the WWAN card.
7. Remove the display assembly.
About this task
The following images indicate the location of the display bezel and provide a visual representation of the removal procedure.
76 Removing and installing components
Steps
NOTE: The display bezel is adhered to the display panel with adhesive. Insert a plastic scribe into the recesses near both
hinge caps to start the prying process to release the display bezel. Pry along the outside edge of the display bezel and work
your way around the entire display bezel until the display bezel is separated from the display cover.
CAUTION: Carefully pry and remove the display bezel to minimize the risk of display panel damages.
1. Insert a plastic scribe into the recesses near both hinge caps to start the prying process to release the display bezel.
2. Pry along the outside edge of the display bezel and work your way around the entire display bezel until the display bezel is
separated from the display cover.
3. Lift the display bezel from the display assembly.
Installing the display bezel
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
About this task
The following image indicates the location of the display bezel and provides a visual representation of the installation procedure.
Removing and installing components 77
Steps
1. Align and place the display bezel on the display assembly.
2. Gently snap the display bezel into place.
Next steps
1. Install the display assembly.
2. Install the WWAN card.
3. Install the wireless card.
4. Install the base cover.
5. Install the microSD card.
6. Install the SIM card.
7. Follow the procedure in After working inside your computer.
78 Removing and installing components
Display panel
Removing the display panel
Prerequisites
1. Follow the procedure in Before working inside your computer.
2. Remove the SIM card.
3. Remove the microSD card.
4. Remove the base cover.
5. Remove the wireless card.
6. Remove the WWAN card.
7. Remove the display assembly.
8. Remove the display bezel.
About this task
The following images indicate the location of the display panel and provide a visual representation of the removal procedure.
Removing and installing components 79
80 Removing and installing components
Removing and installing components 81
Steps
NOTE: The display panel is preassembled with the display brackets as a single service part. Do not pull the Stretch Release
(SR) tapes and separate the brackets from the display panel.
1. Remove the two screws (M2.5x3) that secure the display panel to the display back cover.
NOTE: While removing the display panel, disengage the display panel tabs from the display cover before flipping it over.
2. Lift and open the display panel to access the display cable.
3. Peel the conductive tape on the display cable connector.
4. Peel the clear tape covering the display cable connector.
5. Open the latch and disconnect the cable from the connector on the display panel.
6. Lift the display panel away from the display back cover.
Installing the display panel
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
About this task
The following images indicate the location of the display panel and provide a visual representation of the installation procedure.
82 Removing and installing components
Removing and installing components 83
84 Removing and installing components
Steps
1. Connect the display cable to the connector on the display panel and close the latch.
2. Adhere the clear tape to cover the display cable connector.
3. Adhere the conductive tape to secure the display cable to the display panel.
4. Close the display panel and the display back cover to assemble.
NOTE: Ensure that the display panel tabs are inserted into the slots on the display cover.
5. Replace the two (M2.5x3) screws to secure the display panel to the display back cover.
Next steps
1. Install the display bezel.
2. Install the display assembly.
3. Install the WWAN card.
4. Install the wireless card.
5. Install the base cover.
6. Install the microSD card.
7. Install the SIM card.
8. Follow the procedure in After working inside your computer.
Removing and installing components 85
Camera
Removing the camera
Prerequisites
1. Follow the procedure in Before working inside your computer.
2. Remove the SIM card.
3. Remove the microSD card.
4. Remove the base cover.
5. Remove the wireless card.
6. Remove the WWAN card.
7. Remove the display assembly.
8. Remove the display bezel.
9. Remove the display panel.
10. Remove the display hinges.
About this task
The following images indicate the location of the camera module and provide a visual representation of the removal procedure.
Steps
1. Peel the tape that secures the camera cable.
NOTE: An abrupt peeling may also remove the camera shutter from the display bezel and damage the camera shutter.
2. Lift the latch and disconnect the camera cable from the connector on the camera module.
3. Carefully pry up the camera module starting from the prying point indicated by an etched arrow at the bottom edge of the
camera module.
86 Removing and installing components
4. Pry up the camera module ensuring that the two tiny pegs used to secure the camera module in place are not damaged
throughout the prying process. Carefully lift the camera module from the display back cover.
Installing the camera
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
About this task
The following images indicate the location of the camera and provide a visual representation of the installation procedure.
Removing and installing components 87
Steps
1. Align and place the camera module into the slot on the display back cover.
2. Connect the camera cable to the connector on the camera module.
3. Adhere the tape to secure the camera cable in place.
Next steps
1. Install the display hinge.
2. Install the display panel.
3. Install the display bezel.
4. Install the display assembly.
5. Install the WWAN card.
6. Install the wireless card.
7. Install the base cover.
8. Install the microSD card.
9. Install the SIM card.
10. Follow the procedure in After working inside your computer.
Removing the infrared camera
Prerequisites
1. Follow the procedure in Before working inside your computer.
2. Remove the SIM card.
3. Remove the microSD card.
4. Remove the base cover.
5. Remove the wireless card.
6. Remove the WWAN card.
7. Remove the display assembly.
8. Remove the display bezel.
9. Remove the display panel.
About this task
The following images indicate the location of the infrared camera module and provide a visual representation of the removal
procedure.
88 Removing and installing components
Steps
1. Peel the tape that secures the infrared camera cable.
NOTE: An abrupt peeling may also remove the camera shutter from the display bezel and damage the camera shutter.
2. Lift the latch and disconnect the infrared camera cable from the connector on the camera module.
3. Carefully pry up the camera module starting from the prying point indicated by an etched arrow at the bottom edge of the
camera module.
4. Pry up the camera module ensuring that the two tiny pegs used to secure the camera module in place are not damaged
throughout the prying process. Carefully lift the camera module from the display back cover.
Removing and installing components 89
Installing the infrared camera
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
About this task
The following image indicates the location of the infrared camera and provides a visual representation of the installation
procedure.
Steps
1. Align and place the infrared camera module into the slot on the display back cover.
2. Connect the infrared camera cable to the connector on the camera module.
90 Removing and installing components
3. Adhere the tape to secure the infrared camera cable in place.
Next steps
1. Install the display panel.
2. Install the display bezel.
3. Install the display assembly.
4. Install the WWAN card.
5. Install the wireless card.
6. Install the base cover.
7. Install the microSD card.
8. Install the SIM card.
9. Follow the procedure in After working inside your computer.
eDP/display cable
Removing the eDP/display cable
Prerequisites
1. Follow the procedure in Before working inside your computer.
2. Remove the SIM card.
3. Remove the microSD card.
4. Remove the base cover.
5. Remove the wireless card.
6. Remove the WWAN card.
7. Remove the display assembly.
8. Remove the display bezel.
9. Remove the display panel.
About this task
The following images indicate the location of the eDP cable and provide a visual representation of the removal procedure.
Removing and installing components 91
Steps
1. Disconnect the eDP/display cable from the connector on the camera module.
2. Peel the conductive tape and unroute the eDP/display cable to release it from adhesive and lift the eDP/display cable from
the display back cover.
Installing the eDP cable
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
About this task
The following image indicates the location of the eDP cable and provide a visual representation of the installation procedure.
92 Removing and installing components
Steps
1. Connect the eDP/display cable to the connector on the camera.
2. Adhere the eDP/display cable to the display back cover.
3. Adhere the conductive tape and route the eDP/display cable to the display back cover.
Next steps
1. Install the display panel.
2. Install the display bezel.
3. Install the display assembly.
4. Install the WWAN card.
5. Install the wireless card.
6. Install the base cover.
7. Install the microSD card.
8. Install the SIM card.
9. Follow the procedure in After working inside your computer.
Removing and installing components 93
Sensor board
Removing the sensor board
Prerequisites
1. Follow the procedure in Before working inside your computer.
2. Remove the SIM card.
3. Remove the microSD card.
4. Remove the base cover.
5. Remove the wireless card.
6. Remove the WWAN card.
7. Remove the display assembly.
8. Remove the display bezel.
9. Remove the display panel.
About this task
NOTE: This procedure applies only to computers shipped with a sensor board.
The following image indicates the location of the sensor board and provide a visual representation of the removal procedure.
Steps
1. Open the latch and disconnect the LED cable from connector on the sensor board.
2. Gently lift the sensor board away from the display back cover.
Installing the sensor board
About this task
The following image indicates the location of the sensor board and provide a visual representation of the removal procedure.
94 Removing and installing components
Steps
1. Align and place the sensor board on the display back cover.
2. Connect the LED cable to the connector on the sensor board and close the latch.
Next steps
1. Install the display panel.
2. Install the display bezel.
3. Install the display assembly.
4. Install the WWAN card.
5. Install the wireless card.
6. Install the base cover.
7. Install the microSD card.
8. Install the SIM card.
9. Follow the procedure in After working inside your computer.
Display hinges
Removing the display hinges
Prerequisites
1. Follow the procedure in Before working inside your computer.
2. Remove the SIM card.
3. Remove the microSD card.
4. Remove the base cover.
5. Remove the wireless card.
6. Remove the WWAN card.
7. Remove the display assembly.
8. Remove the display bezel.
9. Remove the display panel.
About this task
The following images indicate the location of the display hinges and provide a visual representation of the removal procedure.
Removing and installing components 95
Steps
1. Remove the two (M2.5x3) screws that secure the right hinge to the display back cover.
2. Lift and remove the right hinge from the display back cover.
3. Remove the two (M2.5x3) screws that secure the left hinge to the display back cover.
4. Lift and remove the left hinge from the display back cover.
Installing the display hinges
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
About this task
The following images indicate the location of the display hinges and provides a visual representation of the installation
procedure.
96 Removing and installing components
Steps
1. Align the screw hole on the left hinge with the screw hole on the display back cover.
2. Replace the two (M2.5x3) screws to secure the left hinge to the display back cover.
3. Align the screw hole on the right hinge with the screw hole on the display back cover.
4. Replace the two (M2.5x3) screws to secure the right hinge to the display back cover.
Next steps
1. Install the display panel.
2. Install the display bezel.
3. Install the display assembly.
4. Install the WWAN card.
5. Install the wireless card.
6. Install the base cover.
7. Install the microSD card.
8. Install the SIM card.
9. Follow the procedure in After working inside your computer.
Removing and installing components 97
Display back cover
Removing the display back cover
Prerequisites
1. Follow the procedure in Before working inside your computer.
2. Remove the SIM card.
3. Remove the microSD card.
4. Remove the base cover.
5. Remove the wireless card.
6. Remove the WWAN card.
7. Remove the display assembly.
8. Remove the display bezel.
9. Remove the display panel.
10. Remove the camera module.
11. Remove the eDP/display cable.
12. Remove the sensor board.
13. Remove the display hinges.
About this task
The following images indicate the location of the display back cover and provide a visual representation of the removal
procedure.
Steps
After performing the steps in the pre-requisites, we are left with the display back cover.
Installing the display back cover
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
98 Removing and installing components
About this task
The following image indicates the location of the display back cover and provides a visual representation of the installation
procedure.
Steps
Place the display back cover on a flat surface.
Next steps
1. Install the display hinge.
2. Install the sensor board.
3. Install the eDP/display cable.
4. Install the camera module.
5. Install the display panel.
6. Install the display bezel.
7. Install the display assembly.
8. Install the WWAN card.
9. Install the wireless card.
10. Install the base cover.
11. Install the microSD card.
12. Install the SIM card.
13. Follow the procedure in After working inside your computer.
Dummy SIM-card slot filler
Removing the dummy SIM-card slot filler
Prerequisites
1. Follow the procedure in Before working inside your computer.
2. Remove the SIM card.
3. Remove the microSD card.
4. Remove the base cover.
Removing and installing components 99
5. Remove the 2280 solid-state drive or 2230 solid-state drive.
6. Remove the memory modules.
7. Remove the battery.
8. Remove the wireless card.
9. Remove the WWAN card.
10. Remove the heat sink heat sink.
11. Remove the assembly inner frame.
12. Remove the system board.
NOTE: The system board can be removed with the heat sink attached in order to simplify the procedure and preserve
the thermal bond between the system board and heat sink.
13. Remove the power-button board.
14. Remove the LED board.
15. Remove the smart card reader.
16. Remove the Keyboard assembly.
17. Remove the display assembly.
18. Remove the palm-rest assembly.
About this task
NOTE: For models shipped with WLAN antennas only, the dummy SIM-card slot filler is a separate service part and is not
included with replacement palm rest. As a result, the dummy SIM-card slot filler must be removed and then reinstalled when
replacing the palm-rest assembly.
The following images indicate the dummy SIM-card slot filler and provides a visual representation of the dummy SIM-card slot
filler removal procedure.
Steps
1. Push the dummy SIM-card slot filler from the top side of the palm-rest assembly.
100 Removing and installing components
2. Lift the dummy SIM-card slot filler out of the palm-rest assembly.
Installing the dummy SIM-card slot filler
Prerequisites
If you are replacing a component, remove the necessary component before the installation procedure.
Removing and installing components 101
About this task
The following images indicate the location of the dummy SIM-card slot filler and provides a visual representation of the dummy
SIM-card slot filler installation procedure.
Steps
1. Place the dummy SIM-card slot filler into its compartment on the palm rest.
NOTE: Ensure that the dummy SIM-card slot filler is aligned with the ribs on the palm-rest assembly.
102 Removing and installing components
2. Press the dummy SIM-card slot filler until it clicks into place and ensure it fits securely into the SIM card slot.
Removing and installing components 103
Next steps
1. Install the palm-rest assembly
2. Install the display assembly.
3. Install the keyboard assembly.
4. Install the smart card reader.
5. Install the LED board.
6. Install the power-button board.
7. Install the system board.
8. Install the heat sink.
9. Install the assembly inner frame.
10. Install the battery.
11. Install the memory modules.
12. Install the WWAN card.
13. Install the wireless card.
14. Install the 2280 solid-state drive or 2230 solid-state drive.
15. Install the base cover.
16. Install the microSD card.
17. Install the SIM card.
18. Follow the procedure in After working inside your computer.
Palm-rest assembly
Removing the palm-rest assembly
Prerequisites
1. Follow the procedure inBefore working inside your computer.
2. Remove the SIM card.
3. Remove the microSD card.
4. Remove the base cover.
5. Remove the 2280 solid-state drive or 2230 solid-state drive.
104 Removing and installing components
6. Remove the memory modules.
7. Remove the battery.
8. Remove the wireless card.
9. Remove the WWAN card.
10. Remove the heat sink heat sink.
11. Remove the assembly inner frame.
12. Remove the system board.
NOTE: The system board can be removed with the heat sink attached in order to simplify the procedure and preserve
the thermal bond between the system board and heat sink.
13. Remove the power-button board.
14. Remove the LED board.
15. Remove the smart card reader.
16. Remove the Keyboard assembly.
17. Remove the display assembly.
18. Remove the dummy SIM-card slot filler.
About this task
The following image indicates the palm-rest assembly and provides a visual representation of the removal procedure.
Steps
After performing the steps in the pre-requisites, we are left with the palm-rest assembly.
Removing and installing components 105
Installing the palm-rest assembly
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
About this task
The following image indicates the palm-rest assembly and provides a visual representation of the installation procedure.
Steps
Place the palm-rest assembly on a flat surface.
NOTE: For models shipped with WLAN antennas only, the filler must be removed then re-installed when replacing the
palm-rest assembly.
106 Removing and installing components
Next steps
1. Install the dummy SIM-card slot filler.
2. Install the display assembly.
3. Install the keyboard assembly.
4. Install the smart card reader.
5. Install the LED board.
6. Install the power-button board.
7. Install the system board.
8. Install the heat sink.
9. Install the assembly inner frame.
10. Install the battery.
11. Install the memory modules.
12. Install the WWAN card.
13. Install the wireless card.
14. Install the 2280 solid-state drive or 2230 solid-state drive.
15. Install the base cover.
16. Install the microSD card.
17. Install the SIM card.
18. Follow the procedure in After working inside your computer.
Removing and installing components 107
BIOS setup
CAUTION: Unless you are an expert computer user, do not change the settings in the BIOS Setup program.
Certain changes can make your computer work incorrectly.
NOTE: Depending on the computer and its installed devices, the items listed in this section may or may not be displayed.
NOTE: Before you change BIOS Setup program, it is recommended that you write down the BIOS Setup program screen
information for future reference.
Use the BIOS Setup program for the following purposes:
●Get information about the hardware installed in your computer, such as the amount of RAM and the size of the hard drive.
●Change the system configuration information.
●Set or change a user-selectable option, such as the user password, type of hard drive installed, and enabling or disabling
base devices.
Entering BIOS setup program
About this task
Turn on (or restart) your computer and press F2 immediately.
Navigation keys
NOTE: For most of the System Setup options, changes that you make are recorded but do not take effect until you restart
the system.
Table 4. Navigation keys
Keys Navigation
Up arrow Moves to the previous field.
Down arrow Moves to the next field.
Enter Selects a value in the selected field (if applicable) or follow
the link in the field.
Spacebar Expands or collapses a drop-down list, if applicable.
Tab Moves to the next focus area.
NOTE: For the standard graphics browser only.
Esc Moves to the previous page until you view the main screen.
Pressing Esc in the main screen displays a message that
prompts you to save any unsaved changes and restarts the
system.
One time boot menu
To enter one time boot menu, turn on your computer, and then press F12 immediately.
NOTE: It is recommended to shutdown the computer if it is on.
4
BIOS setup 109
The one-time boot menu displays the devices that you can boot from including the diagnostic option. The boot menu options
are:
●Removable Drive (if available)
●M.2 Drive (if available)
NOTE: XXX denotes the M.2 drive number.
●Optical Drive (if available)
●NVMe Drives
●Diagnostics
The boot sequence screen also displays the option to access the System Setup screen.
System setup options
NOTE: Depending on your computer and its installed devices, the items listed in this section may or may not appear.
Table 5. System setup options—System information menu
Overview
Latitude 5431
BIOS Version Displays the BIOS version number.
Service Tag Displays the Service Tag of the computer.
Asset Tag Displays the Asset Tag of the computer.
Manufacture Date Displays the manufacture date of the computer.
Ownership Date Displays the ownership date of the computer.
Express Service Code Displays the express service code of the computer.
Ownership Tag Displays the Ownership Tag of the computer.
Signed Firmware Update Displays whether the Signed Firmware Update is enabled on your computer.
Battery Information
Primary Displays that battery is primary.
Battery Level Displays the battery level of the computer.
Battery State Displays the battery state of the computer.
Health Displays the battery health of the computer.
AC Adapter Displays whether the AC adapter is connected or not.
Battery Life Type Display the Battery Life type of the computer
Processor Information
Processor Type Displays the processor type.
Maximum Clock Speed Displays the maximum processor clock speed.
Minimum Clock Speed Displays the minimum processor clock speed.
Current Clock Speed Displays the current processor clock speed.
Core Count Displays the number of cores on the processor.
Processor ID Displays the processor identification code.
Processor L2 Cache Displays the processor L2 Cache size.
Processor L3 Cache Displays the processor L3 Cache size.
Microcode Version Displays the microcode version.
Intel Hyper-Threading Capable Displays whether the processor is Hyper-Threading (HT) capable.
110 BIOS setup
Table 5. System setup options—System information menu (continued)
Overview
64-Bit Technology Displays whether 64-bit technology is used.
Memory Information
Memory Installed Displays the total computer memory installed.
Memory Available Displays the total computer memory available.
Memory Speed Displays the memory speed.
Memory Channel Mode Displays single or dual channel mode.
Memory Technology Displays the technology used for the memory.
DIMM_SLOT 1 Displays the DIMM 1 memory size.
DIMM_SLOT 2 Displays the DIMM 2 memory size.
Devices Information
Panel Type Displays the Panel Type of the computer.
Video Controller Displays the video controller type of the computer.
Video Memory Displays the video memory information of the computer.
Wi-Fi Device Displays the wireless device information of the computer.
Native Resolution Displays the native resolution of the computer.
Video BIOS Version Displays the video BIOS version of the computer.
Audio Controller Displays the audio controller information of the computer.
Bluetooth Device Displays the Bluetooth device information of the computer.
LOM MAC Address Displays the LAN On Motherboard (LOM) MAC address of the computer.
Pass Through MAC Address Displays the pass through MAC address of the computer.
Cellular Device Displays the M.2 PCIe SSD information of the computer.
dGPU Video Controller Displays the Discrete graphics card information on the computer.
Table 6. System setup options—Boot Configuration menu
Boot Configuration
Boot Sequence
Boot mode Displays the boot mode.
Boot Sequence Displays the boot sequence.
Secure Digital (SD) Card Boot Enable or disable the SD card read-only boot.
By default, the Secure Digital (SD) Card Boot option is not enabled.
Secure Boot
Enable Secure Boot Enable or disable the secure boot feature.
By default, the option is enabled.
Secure Boot Mode Enable or disable to change the secure boot mode options.
By default, the Deployed Mode is enabled.
Expert Key Management
Enable Custom Mode Enable or disable custom mode.
By default, the custom mode option is not enabled.
Custom Mode Key Management Select the custom values for expert key management.
BIOS setup 111
Table 7. System setup options—Integrated Devices menu
Integrated Devices
Date/Time Displays the current date in MM/DD/YYYY format and current time in
HH:MM:SS AM/PM format.
Camera Enables or disable the camera.
By default, the Enable Camera option is selected
Audio
Enable Audio Enable or disable the integrated audio controller.
By default, all the options are enabled.
USB/Thunderbolt Configuration ●Enable or disable booting from USB mass storage devices connected to
external USB ports.
By default, the Enable External USB Ports option is enabled.
●Enable or disable booting from USB mass storage devices such as external
hard drive, optical drive, and USB drive.
By default, the Enable USB Boot Support option is enabled.
Enable Thunderbolt Technology
Support
Enable or disable the associated ports and adapters.
By default, the Enable Thunderbolt Technology Support option is selected.
Enable Thunderbolt Boot Support Enable or disable the Thunderbolt adapter peripheral device and USB devices
connected to the Thunderbolt adapter to be used during BIOS Pre-boot.
By default, the Enable Thunderbolt Boot Support option is disabled.
Enable Thunderbolt (and PCIe behind
TBT) pre-boot modules
Enable or disable the PCIe devices that are connected through a Thunderbolt
adapter to execute the PCIe devices UEFI Option ROM (if present) during
pre-boot.
By default, the Enable Thunderbolt (and PCIe behind TBT) pre-boot
modules option is disabled.
Disable USB4 PCIE Tunneling Disable the USB4 PCIE Tunneling option.
By default, the option is disabled.
Video/Power only on Type-C Ports Enable or disable the Type-C port functionality to video or only power.
By default, the Video/Power only on Type-C Ports option is disabled.
Type-C Dock Override Enables to use connected Type-C Dell Dock to provide data stream with
external USB ports disabled. When Type-C Dock override is enabled, the
Video/Audio/Lan submenu is activated.
By default, the Type-C Dock Override option is enabled.
Video Enable or disable the usage of video on Dell Dock external ports.
By default, the Video option is disabled.
Audio Enable or disable the usage of audio on Dell Dock external ports.
By default, the Audio option is enabled.
Lan Enable or disable the usage of LAN on Dell Dock external ports.
By default, the Lan option is enabled.
Miscellaneous Devices Enable or disable Fingerprint Reader device.
By default, the Enable Fingerprint Reader Device option is enabled.
Unobtrusive Mode
Enable Unobtrusive Mode Enable or disable all the computer light and sound.
112 BIOS setup
Table 7. System setup options—Integrated Devices menu (continued)
Integrated Devices
By default, the Enable Unobtrusive Mode option is disabled.
Table 8. System setup options—Storage menu
Storage
SMART Reporting
Enable SMART Reporting Enable or disable Self-Monitoring, Analysis, and Reporting Technology
(SMART) during computer startup.
By default, the Enable SMART Reporting option is not enabled.
Drive Information
M.2 PCIe SSD-1
Type Displays the M.2 PCIe SSD-1 type information of the computer.
Device Displays the M.2 PCIe SSD-1 device information of the computer.
Enable MediaCard
Secure Digital (SD) Card Enable or disable the SD card.
By default, the Secure Digital (SD) Card option is enabled.
Secure Digital (SD) Card Read-Only Mode Enable or disable the SD card read-only mode.
By default, the Secure Digital (SD) Card Read-Only Mode option is not
enabled.
Table 9. System setup options—Display menu
Display
Display Brightness
Brightness on battery power Enable to set screen brightness when the computer is running on battery
power.
Brightness on AC power Enable to set screen brightness when the computer is running on AC power.
Touchscreen Enable to activate the Touchscreen on operating system
Full Screen Logo Enable or disable full screen logo.
By default, the option is not enabled.
Table 10. System setup options—Connection menu
Connection
Network Controller Configuration
Integrated NIC Controls the on-board LAN controller.
By default, the Enabled with PXE option is enabled.
Enable UEFI Network Stack Enable or disable UEFI Network Stack.
By default, the Enable UEFI Network Stack and Enabled w/PXE option are
enabled.
Wireless Device Enable
WWAN/GPS Enable or disable the internal WWAN/GPS device
By default, the option enabled.
WWAN Bus Mode Set the interface type of the Wireless Wan (WWAN) card.
BIOS setup 113
Table 10. System setup options—Connection menu (continued)
Connection
By default, the Bus Mode PCIe option is enabled.
WLAN Enable or disable the internal WLAN device
By default, the option enabled.
Bluetooth Enable or disable the internal Bluetooth device
By default, the option enabled.
Contactless smartcard/NFC Enable or disable the internal Contactless smartcard/NFC device
By default, the option enabled.
Enable UEFI Network Stack Enable or disable UEFI Network Stack and controls the on-board LAN
Controller.
By default, the Enable UEFI Network Stack option are enabled.
Wireless Radio Control
Control WLAN radio Sense the connection of the computer to a wired network and subsequently
disable the selected wireless radios (WLAN).
By default, the option is disabled.
Control WWAN radio Sense the connection of the computer to a wired network and subsequently
disable the selected wireless radios (WWAN).
By default, the option is disabled.
HTTPs Boot Feature
HTTPs Boot Enable or disable the HTTPs Boot feature.
By default, the HTTPs Boot option is enabled.
HTTPs Boot Mode With Auto Mode, the HTTPs Boot extracts Boot URL from the DHCP. With
Manual Mode, the HTTPs Boot reads Boot URL from the user-provided data.
By default, the Auto Mode option is enabled.
Table 11. System setup options—Power menu
Power
Battery configuration Enables the computer to run on battery during peak power usage hours. Use
the table Custom Charge Start and Custom Charge Stop, to prevent AC
power usage between certain times of each day.
By default, the Adaptive option is enabled.
Advanced Configuration
Enable Advanced Battery Charge
Configuration
Enable or disable the advanced battery charge configuration.
By default, the Enable Advanced Battery Charge Configuration option is
disabled.
Peak Shift Enables the computer to run on battery during peak power usage hours.
By default, the Enable Peak Shift option is enabled.
Enable Peak Shift
USB PowerShare
Enable USB PowerShare Enable or disable the USB PowerShare.
By default, the Enable USB PowerShare option is disabled
114 BIOS setup
Table 11. System setup options—Power menu (continued)
Power
Thermal Management Enables to cool the fan and processor heat management to adjust the
computer performance, noise, and temperature.
By default, the Optimized option is enabled.
USB Wake Support
Wake on Dell USB-C Dock When enabled, connecting a Dell USB-C Dock will wake the computer from
standby.
By default, the Wake on Dell USB-C Dock option is enabled.
Block Sleep Enables to block entering sleep (S3) mode in the operating system.
By default, the Block Sleep option is disabled.
Lid Switch Enable or disable the lid switch.
By default, the Lid Switch option is enabled.
Intel Speed Shift Technology Enable or disable the Intel speed shift technology support.
By default, the Intel Speed Shift Technology option is enabled.
Table 12. System setup options—Security menu
Security
TPM 2.0 Security
TPM 2.0 Security On Enable or disable TPM 2.0 security options.
By default, the TPM 2.0 Security On option is enabled.
Attestation Enable Enables to control whether the Trusted Platform Module (TPM) Endorsement
Hierarchy is available to the operating system.
By default, the Attestation Enable option is enabled.
Key Storage Enable Enables to control whether the Trusted Platform Module (TPM) Storage
Hierarchy is available to the operating system.
By default, the Key Storage Enable option is enabled.
SHA-256 BIOS and the TPM will use the SHA-256 hash algorithm to extend
measurements into the TPM PCRs during BIOS boot.
By default, the SHA-256 option is enabled.
Clear Enables to clear the TPM owner information and returns the TPM to the
default state.
By default, the Clear option is disabled.
PPI ByPass for Clear Commands Controls the TPM Physical Presence Interface (PPI).
By default, the PPI ByPass for clear Commands option is disabled.
Intel Total Memory Encryption
Total Memory Encryption Enable or disable you to protect memory from physical attacks including freeze
spray, probing DDR to read the cycles, and others.
By default, the Total Memory Encryption option is disabled.
Chassis intrusion Controls the chassis intrusion feature.
By default, the On-Silent option is enabled.
SMM Security Mitigation Enable or disable SMM Security Mitigation.
By default, the option is enabled.
BIOS setup 115
Table 12. System setup options—Security menu (continued)
Security
Data Wipe on Next Boot
Start Data Wipe Enable or disable the data wipe on next boot.
By default, the option is enabled.
Absolute Enable or disable or permanently disable the BIOS module interface of the
optional Absolute Persistence Module service from Absolute software.
By default, the option is enabled.
UEFI Boot Path Security Controls whether or not the computer will prompt the user to enter the admin
password (if set) when booting to a UEFI boot device from the F12 boot menu.
By default, the Always Except Internal HDD option is enabled.
Table 13. System setup options—Passwords menu
Passwords
Admin Password Set, change, or delete the administrator password.
System Password Set, change, or delete the computer password.
NVMe SSD0 Set, change, or delete the NVMe SSD0 password.
Password Configuration
Upper Case Letter Reinforces password must have at least one upper case letter.
By default, the option is disabled.
Lower Case Letter Reinforces password must have at least one lower case letter.
By default, the option is disabled.
Digit Reinforces password must have at least one digit.
By default, the option is disabled.
Special Character Reinforces password must have at least one special character.
By default, the option is disabled.
Minimum Characters Set the minimum characters allowed for password.
Password Bypass When enabled, this always prompts for computer and internal hard drive
passwords when powered on from the off state.
By default, the Disabled option is enabled.
Password Changes
Enable Non-Admin Password Changes Enable or disable to change computer and hard drive password without the
need for admin password.
By default, the option is enabled.
Admin Setup Lockout
Enable Admin Setup Lockout Enables administrators control over how their users can or cannot access BIOS
setup.
By default, the option is disabled.
Master Password Lockout
Enable Master Password Lockout When enabled, this will disable the master password support.
By default, the option is disabled.
Allow Non-Admin PSID Revert
116 BIOS setup
Table 13. System setup options—Passwords menu (continued)
Passwords
Enable Allow Non-Admin PSID Revert Controls access to the Physical Security ID (PSID) revert of NVMe hard-drives
from the Dell Security Manager prompt.
By default, the option is disabled.
Table 14. System setup options—Update, Recovery menu
Update, Recovery
UEFI Capsule Firmware Updates Enable or disable BIOS updates through UEFI capsule update packages.
By default, the option is enabled.
BIOS Recovery from Hard Drive Enables the user to recover from certain corrupted BIOS conditions from a
recovery file on the user primary hard drive or an external USB key.
By default, the option is enabled.
BIOS Downgrade
Allow BIOS Downgrade Enable or disable the flashing of the computer firmware to previous revision is
blocked.
By default, the option is enabled.
SupportAssist OS Recovery Enable or disable the boot flow for SupportAssist OS Recovery tool in the
event of certain computer errors.
By default, the option is enabled.
BISOConnect Enable or disable cloud Service OS recovery if the main operating system fails
to boot with the number of failures equal to or greater than the value specified
by the Auto OS Recovery Threshold setup option and local Service OS does not
boot or is not installed.
By default, the option is enabled.
Dell Auto OS Recovery Threshold Controls the automatic boot flow for SupportAssist System Resolution Console
and for Dell OS Recovery Tool.
By default, the threshold value is set to 2.
Table 15. System setup options—System Management menu
System Management
Service Tag Display the Service Tag of the computer.
Asset Tag Create a computer Asset Tag.
AC Behavior
Wake on AC Enable or disable the wake on AC option.
By default, the option is disabled.
Wake on LAN
Wake on LAN Enable or disable the computer to power on by special LAN signals when it
receives a wakeup signal from the WLAN.
By default, the Disabled option is selected.
Auto on Time Enable to set the computer to turn on automatically every day or on a
preselected date and time. This option can be configured only if the Auto On
Time is set to Everyday, Weekdays, or Selected Days.
By default, the option is disabled.
Intel AMT Capability Enable Intel Active Management Technology
BIOS setup 117
Table 15. System setup options—System Management menu (continued)
System Management
MEBx Hotkey Allows the user to use Ctrl+P hotkey to access MEBx
USB Provision When enabled, Intel AMT can be provisioned using the local provisioning file
through a USB storage device
Table 16. System setup options—Keyboard menu
Keyboard
Numlock Enable Enable or disable the Numlock function when the computer boots.
By default, the option is enabled.
Fn Lock Options By default, the Fn lock option is enabled.
Keyboard Illumination Enables to change the keyboard illumination settings.
By default, the Bright option is enabled.
Keyboard Backlight Timeout on AC Set the timeout value for the keyboard backlight when an AC adapter is
connected to the computer.
By default, the 10 seconds option is enabled.
Keyboard Backlight Timeout on
Battery
Set the timeout value for the keyboard backlight when the is running only on
battery power.
By default, the 10 seconds option is enabled.
Device Configuration Hotkey Access Manages whether you can access device configuration screens through
hotkeys during computer startup.
By default, the option is enabled.
Table 17. System setup options—Pre-boot Behavior menu
Pre-boot Behavior
Adapter Warnings
Enable Adapter Warnings Enable or disable the warning messages during boot when the adapters with
less power capacity are detected.
By default, the option is enabled.
Warning and Errors Enable or disable the action to be done when a warning or error is encountered.
By default, the Prompt on Warnings and Errors option is enabled.
Fastboot Enable to set the speed of the boot process.
By default, the Minimal option is enabled.
Extend BIOS POST Time Set the BIOS POST time.
By default, the 0 seconds option is enabled.
MAC Address Pass-Through Replaces the external NIC MAC address with the selected MAC address from
the computer.
By default, the System Unique MAC Address option is enabled.
Table 18. System setup options—Performance menu
Performance
Multi Core Support
Active Cores Enables to change the number of CPU cores available to the operating system.
By default, the All Cores options is enabled.
118 BIOS setup
Table 18. System setup options—Performance menu (continued)
Performance
Intel SpeedStep
Enable Intel SpeedStep Technology Enables the computer to dynamically adjust processor voltage and core
frequency, decreasing average power consumption and heat production.
By default, the option is enabled.
C-States Control
Enable C-State Control Enable or disable additional processor sleep states.
By default, the option is enabled.
Intel TurbocBoost Technology
Enable Intel Turbo Boost Technology Enable or disable Intel TurboBoost mode of the processor.
By default, the option is enabled.
Intel Hyper-Threading Technology
Enable Intel Hyper-Threading Technology Enable or disable Hyper-Threading in the processor.
By default, the option is enabled.
Dynamic Tuning:Machine Learning
Enable Dynamic Tuning:Machine Learning Enables the operating system capability to enhance dynamic power tuning
capabilities based on detected workloads.
By default, the option is disabled.
Table 19. System setup options—System Logs menu
System Logs
BIOS Event Log
Clear Bios Event Log Display BIOS events.
By default, the Keep option is enabled.
Thermal Event Log
Clear Thermal Event Log Display Thermal events.
By default, the Keep option is enabled.
Power Event Log
Clear Power Event Log Display power events.
By default, the Keep option is enabled.
License Information Displays the license information of the computer.
Updating the BIOS
Updating the BIOS in Windows
About this task
CAUTION: If BitLocker is not suspended before updating the BIOS, the next time you reboot the system it
will not recognize the BitLocker key. You will then be prompted to enter the recovery key to progress and the
system will ask for this on each reboot. If the recovery key is not known this can result in data loss or an
BIOS setup 119
unnecessary operating system re-install. For more information on this subject, search in the Knowledge Base
Resource at www.dell.com/support.
Steps
1. Go to www.dell.com/support.
2. Click Product support. In the Search support box, enter the Service Tag of your computer, and then click Search.
NOTE: If you do not have the Service Tag, use the SupportAssist feature to automatically identify your computer. You
can also use the product ID or manually browse for your computer model.
3. Click Drivers & Downloads. Expand Find drivers.
4. Select the operating system installed on your computer.
5. In the Category drop-down list, select BIOS.
6. Select the latest version of BIOS, and click Download to download the BIOS file for your computer.
7. After the download is complete, browse the folder where you saved the BIOS update file.
8. Double-click the BIOS update file icon and follow the on-screen instructions.
For more information, search in the Knowledge Base Resource at www.dell.com/support.
Updating the BIOS in Linux and Ubuntu
To update the system BIOS on a computer that is installed with Linux or Ubuntu, see the knowledge base article 000131486 at
www.dell.com/support.
Updating the BIOS using the USB drive in Windows
About this task
CAUTION: If BitLocker is not suspended before updating the BIOS, the next time you reboot the system it
will not recognize the BitLocker key. You will then be prompted to enter the recovery key to progress and the
system will ask for this on each reboot. If the recovery key is not known this can result in data loss or an
unnecessary operating system re-install. For more information on this subject, search in the Knowledge Base
Resource at www.dell.com/support.
Steps
1. Follow the procedure from step 1 to step 6 in Updating the BIOS in Windows to download the latest BIOS setup program file.
2. Create a bootable USB drive. For more information, search in the Knowledge Base Resource at www.dell.com/support.
3. Copy the BIOS setup program file to the bootable USB drive.
4. Connect the bootable USB drive to the computer that needs the BIOS update.
5. Restart the computer and press F12 .
6. Select the USB drive from the One Time Boot Menu.
7. Type the BIOS setup program filename and press Enter.
The BIOS Update Utility appears.
8. Follow the on-screen instructions to complete the BIOS update.
Updating the BIOS from the F12 One-Time boot menu
Update your computer BIOS using the BIOS update.exe file that is copied to a FAT32 USB drive and booting from the F12
One-Time boot menu.
About this task
CAUTION: If BitLocker is not suspended before updating the BIOS, the next time you reboot the system it
will not recognize the BitLocker key. You will then be prompted to enter the recovery key to progress and the
120 BIOS setup
system will ask for this on each reboot. If the recovery key is not known this can result in data loss or an
unnecessary operating system re-install. For more information on this subject, search in the Knowledge Base
Resource at www.dell.com/support.
BIOS Update
You can run the BIOS update file from Windows using a bootable USB drive or you can also update the BIOS from the F12
One-Time boot menu on the computer.
Most of the Dell computers built after 2012 have this capability, and you can confirm by booting your computer to the F12
One-Time Boot Menu to see if BIOS FLASH UPDATE is listed as a boot option for your computer. If the option is listed, then the
BIOS supports this BIOS update option.
NOTE: Only computers with BIOS Flash Update option in the F12 One-Time boot menu can use this function.
Updating from the One-Time boot menu
To update your BIOS from the F12 One-Time boot menu, you need the following:
●USB drive formatted to the FAT32 file system (key does not have to be bootable)
●BIOS executable file that you downloaded from the Dell Support website and copied to the root of the USB drive
●AC power adapter that is connected to the computer
●Functional computer battery to flash the BIOS
Perform the following steps to perform the BIOS update flash process from the F12 menu:
CAUTION: Do not turn off the computer during the BIOS update process. The computer may not boot if you turn
off your computer.
Steps
1. From a turn off state, insert the USB drive where you copied the flash into a USB port of the computer.
2. Turn on the computer and press F12 to access the One-Time Boot Menu, select BIOS Update using the mouse or arrow keys
then press Enter.
The flash BIOS menu is displayed.
3. Click Flash from file.
4. Select external USB device.
5. Select the file and double-click the flash target file, and then click Submit.
6. Click Update BIOS. The computer restarts to flash the BIOS.
7. The computer will restart after the BIOS update is completed.
System and setup password
Table 20. System and setup password
Password type Description
System password Password that you must enter to log in to your system.
Setup password Password that you must enter to access and make changes to
the BIOS settings of your computer.
You can create a system password and a setup password to secure your computer.
CAUTION: The password features provide a basic level of security for the data on your computer.
CAUTION: Anyone can access the data that is stored on your computer if it is not locked and left unattended.
NOTE: System and setup password feature is disabled.
BIOS setup 121
Assigning a system setup password
Prerequisites
You can assign a new System or Admin Password only when the status is in Not Set.
About this task
To enter the system setup, press F12 immediately after a power-on or reboot.
Steps
1. In the System BIOS or System Setup screen, select Security and press Enter.
The Security screen is displayed.
2. Select System/Admin Password and create a password in the Enter the new password field.
Use the following guidelines to assign the system password:
●A password can have up to 32 characters.
●At least one special character: ! " # $ % & ' ( ) * + , - . / : ; < = > ? @ [ \ ] ^ _ ` { | }
●Numbers 0 through 9.
●Upper case letters from A to Z.
●Lower case letters from a to z.
3. Type the system password that you entered earlier in the Confirm new password field and click OK.
4. Press Esc and save the changes as prompted by the pop-up message.
5. Press Y to save the changes.
The computer restarts.
Deleting or changing an existing system setup password
Prerequisites
Ensure that the Password Status is Unlocked (in the System Setup) before attempting to delete or change the existing
System and/or Setup password. You cannot delete or change an existing System or Setup password, if the Password Status is
Locked.
About this task
To enter the System Setup, press F12 immediately after a power-on or reboot.
Steps
1. In the System BIOS or System Setup screen, select System Security and press Enter.
The System Security screen is displayed.
2. In the System Security screen, verify that Password Status is Unlocked.
3. Select System Password, update, or delete the existing system password, and press Enter or Tab.
4. Select Setup Password, update, or delete the existing setup password, and press Enter or Tab.
NOTE: If you change the System and/or Setup password, reenter the new password when prompted. If you delete the
System and/or Setup password, confirm the deletion when prompted.
5. Press Esc and a message prompts you to save the changes.
6. Press Y to save the changes and exit from System Setup.
The computer restarts.
Clearing CMOS settings
About this task
CAUTION: Clearing CMOS settings will reset the BIOS settings on your computer.
122 BIOS setup
Steps
1. Remove the base cover.
2. Disconnect the battery cable from the system board.
3. Remove the coin-cell battery.
4. Wait for one minute.
5. Replace the coin-cell battery.
6. Connect the battery cable to the system board.
7. Replace the base cover.
Clearing BIOS (System Setup) and System passwords
About this task
To clear the system or BIOS passwords, contact Dell technical support as described at www.dell.com/contactdell.
NOTE: For information on how to reset Windows or application passwords, refer to the documentation accompanying
Windows or your application.
BIOS setup 123
Troubleshooting
Handling swollen Lithium-ion batteries
Like most laptops, Dell laptops use lithium-ion batteries. One type of lithium-ion battery is the lithium-ion polymer battery.
Lithium-ion polymer batteries have increased in popularity in recent years and have become standard in the electronics industry
due to customer preferences for a slim form factor (especially with newer ultra-thin laptops) and long battery life. Inherent to
lithium-ion polymer battery technology is the potential for swelling of the battery cells.
Swollen battery may impact the performance of the laptop. To prevent possible further damage to the device enclosure or
internal components leading to malfunction, discontinue the use of the laptop and discharge it by disconnecting the AC adapter
and letting the battery drain.
Swollen batteries should not be used and should be replaced and disposed of properly. We recommend contacting Dell product
support for options to replace a swollen battery under the terms of the applicable warranty or service contract, including options
for replacement by a Dell authorized service technician.
The guidelines for handling and replacing Lithium-ion batteries are as follows:
●Exercise caution when handling Lithium-ion batteries.
●Discharge the battery before removing it from the system. To discharge the battery, unplug the AC adapter from the system
and operate the system only on battery power. When the system will no longer power on when the power button is pressed,
the battery is fully discharged.
●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 type to pry on or against the battery.
●If a battery gets stuck in a device as a result of swelling, do not try to free it as puncturing, bending, or crushing a battery
can be dangerous.
●Do not attempt to reassemble a damaged or swollen battery into a laptop.
●Swollen batteries that are covered under warranty should be returned to Dell in an approved shipping container (provided
by Dell)—this is to comply with transportation regulations. Swollen batteries that are not covered under warranty should be
disposed of at an approved recycling center. Contact Dell product support at https://www.dell.com/support for assistance
and further instructions.
●Using a non-Dell or incompatible battery may increase the risk of fire or explosion. Replace the battery only with a
compatible battery purchased from Dell that is designed to work with your Dell computer. Do not use a battery from other
computers with your computer. Always purchase genuine batteries from https://www.dell.com or otherwise directly from
Dell.
Lithium-ion batteries can swell for various reasons such as age, number of charge cycles, or exposure to high heat. For more
information on how to improve the performance and lifespan of the laptop battery and to minimize the possibility of occurrence
of the issue, search Dell Laptop Battery in the Knowledge Base Resource at www.dell.com/support.
Dell SupportAssist Pre-boot System Performance
Check diagnostics
About this task
SupportAssist diagnostics (also known as system diagnostics) performs a complete check of your hardware. The Dell
SupportAssist Pre-boot System Performance Check diagnostics 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
●Display or save test results
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124 Troubleshooting
●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: Some tests for specific devices require user interaction. Always ensure that you are present at the computer
terminal when the diagnostic tests are performed.
For more information, see https://www.dell.com/support/kbdoc/000180971.
Running the SupportAssist Pre-Boot System Performance Check
Steps
1. Turn on your computer.
2. As the computer boots, press the F12 key as the Dell logo appears.
3. On the boot menu screen, select the Diagnostics option.
4. Click the arrow at the bottom left corner.
Diagnostics front page is displayed.
5. Click the arrow in the lower-right corner to go to the page listing.
The items detected are listed.
6. To run a diagnostic test on a specific device, press Esc and click Yes to stop the diagnostic test.
7. Select the device from the left pane and click Run Tests.
8. If there are any issues, error codes are displayed.
Note the error code and validation number and contact Dell.
Built-in self-test (BIST)
M-BIST
M-BIST (Built In Self-Test) is the system board's built-in self-test diagnostics tool that improves the diagnostics accuracy of
system board embedded controller (EC) 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
3. If there is a failure with the system board, the battery status LED will flash one of the following error codes for 30 seconds:
Table 21. LED error codes
Blinking Pattern Possible Problem
Amber White
2 1 CPU Failure
2 8 LCD Power Rail Failure
1 1 TPM Detection Failure
2 4 Unrecoverable SPI Failure
4. If there is no failure with the system board, the LCD will cycle through the solid color screens described in the LCD-BIST
section for 30 seconds and then power off.
Troubleshooting 125
LCD Power rail test (L-BIST)
L-BIST is an enhancement to the single LED error code diagnostics and is automatically initiated during POST. L-BIST will check
the LCD power rail. If there is no power being supplied to the LCD (i.e., the L-BIST circuit fails), the battery status LED will flash
either an error code [2,8] or an error code [2,7].
NOTE: If L-BIST fails, LCD-BIST cannot function as no power will be supplied to the LCD.
How to invoke L-BIST Test:
1. Press the power button to start the system.
2. If the system does not start up normally, look at the battery status LED:
●If the battery status LED flashes an error code [2,7], the display cable may not be connected properly.
●If the battery status LED flashes an error code [2,8], there is a failure on the LCD power rail of the system board, hence
there is no power supplied to the LCD.
3. For cases, when a [2,7] error code is shown, check to see if the display cable is properly connected.
4. For cases when a [2,8] error code is shown, replace the system board.
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).
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
the system boots up.
5. The screen will display solid colors and change colors on the entire screen to white, black, red, green, and blue twice.
6. Then it will display the colors white, black and red.
7. Carefully inspect the screen for abnormalities (any lines, fuzzy color or distortion on the screen).
8. At the end of the last solid color (red), the system will shut down.
NOTE: Dell SupportAssist Pre-boot diagnostics upon launch, initiates an LCD BIST first, expecting a user intervention
confirm functionality of the LCD.
System-diagnostic lights
This section lists the system-diagnostic lights of your Latitude 5431.
Table 22. System-diagnostic lights
Blinking pattern
Problem description Suggested resolutionAmber White
1 1 TPM detection failure Replace the system board.
1 2 Unrecoverable SPI Flash
Failure Replace the system board.
1 5 EC unable to program i-Fuse Replace the system board.
126 Troubleshooting
Table 22. System-diagnostic lights (continued)
Blinking pattern
Problem description Suggested resolutionAmber White
1 6 Generic catch-all for
ungraceful EC code flow
errors
Disconnect all power source
(AC, battery, coin cell) and
drain flea power by pressing
and holding down power
button for 3~5 seconds.
2 1 CPU failure ●Run the Dell Support
Assist/Dell Diagnostics
tool.
●If problem persists,
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.
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 ●Reset and swap memory
modules among the slots.
●If problem persists,
replace the memory
module.
2 5 Invalid memory installed ●Reset and swap memory
modules among the slots.
●If problem persists,
replace the memory
module.
2 6 System board/Chipset Error Replace the system board.
2 7 LCD failure (SBIOS message) Replace the LCD module.
2 8 LCD failure (EC detection of
power rail failure) Replace the system board.
3 1 CMOS battery failure ●Reset the main battery
connection.
●If problem persists,
replace the main 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.
3 5 Power rail failure Replace the system board.
3 6 Flash corruption detected by
SBIOS.
●Press power button for
over 25 seconds to do
Troubleshooting 127
Table 22. System-diagnostic lights (continued)
Blinking pattern
Problem description Suggested resolutionAmber White
RTC reset. If problem
persists, replace the
system board.
●Disconnect all power
source (AC, battery, coin
cell) and drain flea power
by pressing and holding
down power button 3~5
seconds to ensure all
power are drained.
●Run "BIOS recovery from
USB", and the instructions
are in the website Dell
support.
●If problem persists,
replace the system board.
3 7 Timeout waiting on ME to
reply to HECI message. Replace the system board.
NOTE: Blinking 3-3-3 LEDs on Lock LED (Caps-Lock or Nums-Lock), Power button LED (without Fingerprint reader), and
Diagnostic LED indicates failure to provide input during LCD panel test on Dell SupportAssist Pre-boot System Performance
Check diagnostics.
Recovering the operating system
When your computer is unable to boot to the operating system even after repeated attempts, it automatically starts Dell
SupportAssist OS Recovery.
Dell SupportAssist OS Recovery is a standalone tool that is preinstalled in all Dell computers installed with Windows operating
system. It consists of tools to diagnose and troubleshoot issues that may occur before your computer boots to the operating
system. It enables you to diagnose hardware issues, repair your computer, back up your files, or restore your computer to its
factory state.
You can also download it from the Dell Support website to troubleshoot and fix your computer when it fails to boot into their
primary operating system due to software or hardware failures.
For more information about the Dell SupportAssist OS Recovery, see Dell SupportAssist OS Recovery User's Guide at
www.dell.com/serviceabilitytools. Click SupportAssist and then, click SupportAssist OS Recovery.
Real-Time Clock (RTC Reset)
The Real Time Clock (RTC) reset function allows you or the service technician to recover Dell systems from No POST/No
Power/No Boot situations. The legacy jumper enabled RTC reset has been retired on these models.
Start the RTC reset with the system powered off and connected to AC power. Press and hold the power button for
thirty (30) seconds
. The system RTC Reset occurs after you release the power button.
Auto RTC reset
The auto RTC reset feature automates the manual process of the RTC recovery function from a No Power or No POST failures.
When two instances of No Power, No POST issues are detected, the computer automatically attempts an RTC Reset.
128 Troubleshooting
Backup media and recovery options
It is recommended to create a recovery drive to troubleshoot and fix problems that may occur with Windows. Dell proposes
multiple options for recovering Windows operating system on your Dell PC. For more information. see Dell Windows Backup
Media and Recovery Options.
WiFi power cycle
About this task
If your computer is unable to access the internet due to WiFi connectivity issues a WiFi power cycle procedure may be
performed. The following procedure provides the instructions on how to conduct a WiFi power cycle:
NOTE: Some ISPs (Internet Service Providers) provide a modem/router combo device.
Steps
1. Turn off your computer.
2. Turn off the modem.
3. Turn off the wireless router.
4. Wait for 30 seconds.
5. Turn on the wireless router.
6. Turn on the modem.
7. Turn on your computer.
Drain residual flea power (perform hard reset)
About this task
Flea power is the residual static electricity that remains in the computer even after it has been powered off and the battery is
removed.
For your safety, and to protect the sensitive electronic components in your computer, you are requested to drain residual flea
power before removing or replacing any components in your computer.
Draining residual flea power, also known as a performing a "hard reset", is also a common troubleshooting step if your computer
does not power on or boot into the operating system.
To drain residual flea power (perform a hard reset)
Steps
1. Turn off your computer.
2. Disconnect the power adapter from your computer.
3. Remove the base cover.
4. Remove the battery.
5. Press and hold the power button for 20 seconds to drain the flea power.
6. Install the battery.
7. Install the base cover.
8. Connect the power adapter to your computer.
9. Turn on your computer.
NOTE: For more information about performing a hard reset, search in the Knowledge Base Resource at www.dell.com/
support.
Troubleshooting 129
Getting help and contacting Dell
Self-help resources
You can get information and help on Dell products and services using these self-help resources:
Table 23. Self-help resources
Self-help resources Resource location
Information about Dell products and services www.dell.com
My Dell app
Tips
Contact Support In Windows search, type Contact Support, and press
Enter.
Online help for operating system www.dell.com/support/windows
www.dell.com/support/linux
Access top solutions, diagnostics, drivers and downloads, and
learn more about your computer through videos, manuals and
documents.
Your Dell computer is uniquely identified by a Service Tag or
Express Service Code. To view relevant support resources for
your Dell computer, enter the Service Tag or Express Service
Code at www.dell.com/support.
For more information on how to find the Service Tag for your
computer, see Locate the Service Tag on your computer.
Dell knowledge base articles for a variety of computer
concerns 1. Go to www.dell.com/support.
2. On the menu bar at the top of the Support page, select
Support > Knowledge Base.
3. In the Search field on the Knowledge Base page, type the
keyword, topic, or model number, and then click or tap the
search icon to view the related articles.
Contacting Dell
To contact Dell for sales, technical support, or customer service issues, see www.dell.com/contactdell.
NOTE: Availability varies by country/region and product, and some services may not be available in your country/region.
NOTE: If you do not have an active Internet connection, you can find contact information about your purchase invoice,
packing slip, bill, or Dell product catalog.
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130 Getting help and contacting Dell