DELL 5391 User Manual

Displayed below is the user manual for 5391 by DELL which is a product in the Notebooks category. This manual has pages.

Related Manuals

DELL 5391 Manual

Inspiron 5391

Service Manual

Regulatory Model: P114G

Regulatory Type: P114G001

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.

subsidiaries. Other trademarks may be trademarks of their respective owners.

2019 - 08

Rev. A00

1 Safety instructions....................................................................................................................... 6

Before working inside your computer................................................................................................................................. 6

Before you begin .............................................................................................................................................................6

Electrostatic discharge—ESD protection.......................................................................................................................... 7

ESD field service kit ..............................................................................................................................................................7

Transporting sensitive components.................................................................................................................................... 8

After working inside your computer....................................................................................................................................8

2 Removing and installing components............................................................................................. 9

Recommended tools..............................................................................................................................................................9

Screw list................................................................................................................................................................................ 9

Base cover............................................................................................................................................................................ 10

Removing the base cover..............................................................................................................................................10

Installing the base cover.................................................................................................................................................11

Battery...................................................................................................................................................................................12

Removing the battery.................................................................................................................................................... 12

Installing the battery...................................................................................................................................................... 13

Coin-cell battery................................................................................................................................................................... 14

Removing the coin-cell battery.....................................................................................................................................14

Installing the coin-cell battery.......................................................................................................................................15

Solid-state drive................................................................................................................................................................... 16

Removing the M.2 2280 solid-state drive...................................................................................................................16

Installing the M.2 2280 solid-state drive..................................................................................................................... 17

Removing the M.2 2230 solid-state drive...................................................................................................................18

Installing the M.2 2230 solid-state drive..................................................................................................................... 19

Heat sink...............................................................................................................................................................................20

Removing the heat sink................................................................................................................................................ 20

Installing the heat sink....................................................................................................................................................21

Fan.........................................................................................................................................................................................22

Removing the fan.......................................................................................................................................................... 22

Installing the fan.............................................................................................................................................................23

Speakers............................................................................................................................................................................... 25

Removing the speakers................................................................................................................................................ 25

Installing the speakers...................................................................................................................................................26

WLAN card........................................................................................................................................................................... 27

Removing the WLAN card............................................................................................................................................27

Installing the WLAN card.............................................................................................................................................. 27

WWAN card......................................................................................................................................................................... 28

Removing the WWAN card.......................................................................................................................................... 28

Installing the WWAN card............................................................................................................................................ 29

Touchpad..............................................................................................................................................................................30

Removing the touchpad............................................................................................................................................... 30

Installing the touchpad...................................................................................................................................................31

Power-adapter port............................................................................................................................................................ 33

Contents

Contents 3

Removing the power-adapter port..............................................................................................................................33

Installing the power-adapter port................................................................................................................................33

Display assembly..................................................................................................................................................................34

Removing the display assembly................................................................................................................................... 34

Installing the display assembly......................................................................................................................................37

I/O board.............................................................................................................................................................................. 39

Removing the I/O board...............................................................................................................................................39

Installing the I/O board................................................................................................................................................. 40

Power-button board............................................................................................................................................................ 41

Removing the power-button board............................................................................................................................. 41

Installing the power-button board............................................................................................................................... 42

Power button with fingerprint reader...............................................................................................................................42

Removing the power button with fingerprint reader................................................................................................ 42

Installing the power button with fingerprint reader.................................................................................................. 43

System board....................................................................................................................................................................... 44

Removing the system board........................................................................................................................................ 44

Installing the system board...........................................................................................................................................46

Display bezel.........................................................................................................................................................................47

Removing the display bezel.......................................................................................................................................... 47

Installing the display bezel............................................................................................................................................ 48

Display panel.........................................................................................................................................................................49

Removing the display panel..........................................................................................................................................49

Installing the display panel............................................................................................................................................ 52

Display hinges...................................................................................................................................................................... 55

Removing the display hinges........................................................................................................................................55

Installing the display hinges.......................................................................................................................................... 55

Camera................................................................................................................................................................................. 56

Removing the camera...................................................................................................................................................56

Installing the camera......................................................................................................................................................57

Display back-cover.............................................................................................................................................................. 58

Removing the display back-cover............................................................................................................................... 58

Installing the display back-cover..................................................................................................................................59

Display cable.........................................................................................................................................................................60

Removing the display cable..........................................................................................................................................60

Installing the display cable............................................................................................................................................. 61

Palm-rest and keyboard assembly.................................................................................................................................... 62

Removing the palm-rest and keyboard assembly......................................................................................................62

Installing the palm-rest and keyboard assembly........................................................................................................ 63

3 Device drivers............................................................................................................................ 65

Intel Chipset Software Installation Utility......................................................................................................................... 65

Video drivers........................................................................................................................................................................ 65

Intel Serial IO driver.............................................................................................................................................................65

Intel Trusted Execution Engine Interface.........................................................................................................................65

Intel Virtual Button driver................................................................................................................................................... 65

Wireless and Bluetooth drivers..........................................................................................................................................65

4 System setup.............................................................................................................................66

System setup....................................................................................................................................................................... 66

4Contents

Entering BIOS setup program............................................................................................................................................66

Navigation keys....................................................................................................................................................................66

Boot Sequence.....................................................................................................................................................................67

System setup options......................................................................................................................................................... 67

Clearing CMOS settings..................................................................................................................................................... 75

Clearing BIOS (System Setup) and System passwords.................................................................................................75

5 Troubleshooting......................................................................................................................... 76

Enhanced Pre-Boot System Assessment (ePSA) diagnostics......................................................................................76

Running the ePSA diagnostics..................................................................................................................................... 76

System diagnostic lights..................................................................................................................................................... 76

Diagnostics............................................................................................................................................................................77

M-BIST............................................................................................................................................................................78

LCD Built-In Self-Test (BIST)...................................................................................................................................... 78

Recovering the operating system......................................................................................................................................78

Flashing BIOS (USB key)....................................................................................................................................................79

Flashing the BIOS................................................................................................................................................................ 79

Flea power release...............................................................................................................................................................79

Wi-Fi power cycle................................................................................................................................................................80

6 Getting help and contacting Dell.................................................................................................. 81

Contents 5

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.

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

safety best practices, see the Regulatory Compliance home page at www.dell.com/regulatory_compliance.

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

computer, replace all covers, panels, and screws before connecting to the electrical outlet.

CAUTION: To avoid damaging the computer, ensure that the work surface is flat and clean.

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

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

CAUTION: 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 shipped with the product or at www.dell.com/regulatory_compliance.

CAUTION: Before touching anything inside your computer, ground yourself by using a wrist grounding strap or by

periodically 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 on its connector or on its pull tab, not on the cable itself. Some cables have

connectors with locking tabs or thumb-screws that you must disengage before disconnecting the cable. When

disconnecting cables, keep them evenly aligned to avoid bending any connector pins. When connecting cables, ensure

that the ports and connectors are correctly oriented and aligned.

CAUTION: Press and eject any installed card from the media-card reader.

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

Topics:

•Before working inside your computer

•Electrostatic discharge—ESD protection

•ESD field service kit

•Transporting sensitive components

•After working inside your computer

Before working inside your computer

NOTE: The images in this document may differ from your computer depending on the configuration you ordered.

Before you begin

Steps

1. Save and close all open files and exit all open applications.

2. Shut down your computer. Click Start > Power > Shut down.

6 Safety instructions

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.

5. Remove any media card and optical disc from your computer, if applicable.

Electrostatic discharge—ESD protection

ESD is a major concern when you handle electronic components, especially sensitive components such as expansion cards, processors,

memory DIMMs, and system boards. Very slight charges can damage circuits in ways that may not be obvious, such as intermittent

problems or a shortened product life span. As the industry pushes for lower power requirements and increased density, ESD protection is

an increasing concern.

Due to the increased density of semiconductors used in recent Dell products, the sensitivity to static damage is now higher than in

previous Dell products. For this reason, some previously approved methods of handling parts are no longer applicable.

Two recognized types of ESD damage are catastrophic and intermittent failures.

•Catastrophic – Catastrophic failures represent approximately 20 percent of ESD-related failures. The damage causes an immediate

and complete loss of device functionality. An example of catastrophic failure is a memory DIMM that has received a static shock and

immediately generates a "No POST/No Video" symptom with a beep code emitted for missing or nonfunctional memory.

•Intermittent – Intermittent failures represent approximately 80 percent of ESD-related failures. The high rate of intermittent failures

means that most of the time when damage occurs, it is not immediately recognizable. The DIMM receives a static shock, but the

tracing is merely weakened and does not immediately produce outward symptoms related to the damage. The weakened trace may

take weeks or months to melt, and in the meantime may cause degradation of memory integrity, intermittent memory errors, etc.

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.

Safety instructions 7

•Insulator Elements – It is critical to keep ESD sensitive devices, such as plastic heat sink casings, away from internal parts that are

insulators and often highly charged.

•Working Environment – Before deploying the ESD Field Service kit, assess the situation at the customer location. For example,

deploying the kit for a server environment is different than for a desktop or portable environment. Servers are typically installed in a

rack within a data center; desktops or portables are typically placed on office desks or cubicles. Always look for a large open flat work

area that is free of clutter and large enough to deploy the ESD kit with additional space to accommodate the type of system that is

being repaired. The workspace should also be free of insulators that can cause an ESD event. On the work area, insulators such as

Styrofoam and other plastics should always be moved at least 12 inches or 30 centimeters away from sensitive parts before physically

handling any hardware components.

•ESD Packaging – All ESD-sensitive devices must be shipped and received in static-safe packaging. Metal, static-shielded bags are

preferred. However, you should always return the damaged part using the same ESD bag and packaging that the new part arrived in.

The ESD bag should be folded over and taped shut and all the same foam packing material should be used in the original box that the

new part arrived in. ESD-sensitive devices should be removed from packaging only at an ESD-protected work surface, and parts

should never be placed on top of the ESD bag because only the inside of the bag is shielded. Always place parts in your hand, on the

ESD mat, in the system, or inside an anti-static bag.

•Transporting Sensitive Components – When transporting ESD sensitive components such as replacement parts or parts to be

returned to Dell, it is critical to place these parts in anti-static bags for safe transport.

ESD protection summary

It is recommended that all field service technicians use the traditional wired ESD grounding wrist strap and protective anti-static mat at all

times when servicing Dell products. In addition, it is critical that technicians keep sensitive parts separate from all insulator parts while

performing service and that they use anti-static bags for transporting sensitive components.

Transporting sensitive components

When transporting ESD sensitive components such as replacement parts or parts to be returned to Dell, it is critical to place these parts in

anti-static bags for safe transport.

Lifting equipment

Adhere to the following guidelines when lifting heavy weight equipment:

CAUTION: Do not lift greater than 50 pounds. Always obtain additional resources or use a mechanical lifting device.

1. Get a firm balanced footing. Keep your feet apart for a stable base, and point your toes out.

2. Tighten stomach muscles. Abdominal muscles support your spine when you lift, offsetting the force of the load.

3. Lift with your legs, not your back.

4. Keep the load close. The closer it is to your spine, the less force it exerts on your back.

5. Keep your back upright, whether lifting or setting down the load. Do not add the weight of your body to the load. Avoid twisting your

body and back.

6. Follow the same techniques in reverse to set the load down.

After working inside your computer

About this task

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.

5. Turn on your computer.

8Safety instructions

Removing and installing components

Recommended tools

The procedures in this document may require the following tools:

• Phillips screwdriver #1

• Flat-head screwdriver

• 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 surface when

replacing a component.

NOTE: Screw color may vary with the configuration ordered.

Table 1. Screw list

Component Secured to Screw type Quantity Screw image

Base cover Palm-rest and keyboard

assembly

M2x6 4

Battery Palm-rest and keyboard

assembly

M2x2 4

Battery Palm-rest and keyboard

assembly

M1.6x4 1

Touchpad bracket Palm-rest and keyboard

assembly

M1.6x2 3

Touchpad Palm-rest and keyboard

assembly

M1.6x2 2

I/O-board bracket Palm-rest and keyboard

assembly

M2.5x3.5 2

I/O-board Palm-rest and keyboard

assembly

M2x3 1

Solid-state drive System board M2x2.5 1

Wireless-card bracket Wireless card and system

board

M2x2.5 1

Fan System board M2x3 2

Right display hinge System board M2x4 1

Removing and installing components 9

Component Secured to Screw type Quantity Screw image

Left display hinge Display back-cover and

antenna assembly

M2.5x3.5 2

Hinges Display back-cover and

antenna assembly

M2.5x2.5 6

Display-cable bracket System board M2.5x3.5 1

Power-adapter port Palm-rest and keyboard

assembly

M2x3 1

Power button with

fingerprint reader bracket

Palm-rest and keyboard

assembly

M1.6x2 1

Power button with

fingerprint reader

Palm-rest and keyboard

assembly

M1.6x2 1

Base cover

Removing the base cover

Prerequisites

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

About this task

The following image indicates the location of the base cover and provides a visual representation of the removal procedure.

10 Removing and installing components

Steps

1. Loosen the three captive screws on the base cover.

2. Remove the four screws (M2x6) that secure the base cover to the palm-rest and keyboard assembly.

3. Pry the base cover starting from the top-left corner of the palm-rest and keyboard assembly.

4. 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 image indicates the location of the base cover and provides a visual representation of the installation procedure.

Removing and installing components 11

Steps

1. Place the computer with the hinges facing towards you.

2. Align the base cover on the palm-rest and keyboard assembly, and snap the base cover into place.

3. Replace the four screws (M2x6) that secure the base cover to the palm-rest and keyboard assembly.

4. Tighten the three captive screws that secure the base cover to the palm-rest and keyboard assembly.

Next steps

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

Battery

Removing the battery

Prerequisites

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

2. Remove the base cover.

About this task

The following image indicates the location of the battery and provides a visual representation of the removal procedure.

12 Removing and installing components

Steps

1. Disconnect the battery cable from the system board.

2. Remove the four screws (M2x2) that secure the battery to the palm-rest and keyboard assembly.

3. Remove the screw (M1.6x4) that secures the battery to the system board and palm-rest and keyboard assembly.

4. Lift the battery off the palm-rest and keyboard assembly.

Installing the 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 battery and provides a visual representation of the installation procedure.

Removing and installing components 13

Steps

1. Connect the battery cable to the system board.

2. Replace the four screws (M2x2) that secure the battery to the palm-rest and keyboard assembly.

3. Replace the screw (M1.6x4) that secures the battery to the system board and palm-rest and keyboard assembly.

Next steps

1. Install the base cover.

2. 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 base cover.

3. Remove the battery.

About this task

The following image indicates the location of the coin-cell battery and provides a visual representation of the removal procedure.

14 Removing and installing components

Steps

1. Disconnect the coin-cell battery cable from the system board.

2. Remove the coin-cell battery cable from the routing guide.

3. Peel the coin-cell battery off the palm-rest and keyboard 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.

Removing and installing components 15

Steps

1. Adhere the coin-cell battery to the slot on the palm-rest and keyboard assembly.

2. Route the coin-cell battery cable through the routing guide.

3. Connect the coin-cell battery cable to the system board.

Next steps

1. Install the battery.

2. Install the base cover.

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

Solid-state drive

Removing the M.2 2280 solid-state drive

Prerequisites

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

2. Remove the base cover.

3. Remove the battery.

About this task

The following image indicates the location of the solid-state drive and provides a visual representation of the removal procedure.

16 Removing and installing components

Steps

1. Remove the screw (M2x2.5) that secures the solid-state drive to the system board.

2. Slide and remove the solid-state drive from the solid-state drive slot on the system board.

Installing the M.2 2280 solid-state drive

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 solid-state drive and provides a visual representation of the installation procedure.

Removing and installing components 17

Steps

1. Align the notch on the solid-state drive with the tab on the solid-state drive slot and slide the solid-state drive into the solid-state drive

slot on the system board.

2. Replace the screw (M2x2.5) that secures the solid-state drive to the system board.

Next steps

1. Install the battery.

2. Install the base cover.

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

Removing the M.2 2230 solid-state drive

Prerequisites

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

2. Remove the base cover.

3. Remove the battery.

About this task

The following image indicates the location of the solid-state drive and provides a visual representation of the removal procedure.

18 Removing and installing components

Steps

1. Remove the screw (M2x2.5) that secures the solid-state drive bracket to the system board.

2. Slide and remove the solid-state drive bracket off the solid-state drive on the system board.

3. Slide and remove the solid-state drive off the solid-state drive slot on the system board.

Installing the M.2 2230 solid-state drive

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 solid-state drive and provides a visual representation of the installation procedure.

Removing and installing components 19

Steps

1. Align the notch on the solid-state drive with the tab on the solid-state drive slot and slide the solid-state drive into the solid-state drive

slot on the system board.

2. Slide the solid-state bracket on to the solid-state drive on the system board.

3. Replace the screw (M2x2.5) that secures the solid-state drive to the system board.

Next steps

1. Install the battery.

2. Install the base cover.

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

Heat sink

Removing the heat sink

Prerequisites

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

2. Remove the base cover.

3. Remove the battery.

About this task

The following image indicates the location of the heat sink and provides a visual representation of the removal procedure.

20 Removing and installing components

Steps

1. Peel the mylar tape that secures the heat sink to the system board.

2. In the reverse sequential order (7>6>5>4>3>2>1), loosen the seven captive screws that secure the heat sink to the system board.

3. Lift the heat sink off the system board.

Installing the heat sink

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 base cover and provides a visual representation of the installation procedure.

Removing and installing components 21

Steps

1. Align and place the screw holes on the heat sink with the screw holes on the system board.

2. In sequential order (as indicated on the heat sink), tighten the seven captive screws that secure the heat sink to the system board.

3. Adhere the mylar tape that secures the heat sink to the system board.

Next steps

1. Install the battery.

2. Install the base cover.

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

Fan

Removing the fan

Prerequisites

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

2. Remove the base cover.

3. Remove the battery.

About this task

The following image indicates the location of fan and provides a visual representation of the removal procedure.

22 Removing and installing components

Steps

1. Disconnect the I/O-board cable from the system board and I/O board.

NOTE: This step is only applicable for computers shipped with a WWAN configuration.

2. Remove the two (M2x3) screws that secure the fan to the system board.

3. Lift the fan slightly off the palm-rest and keyboard assembly.

4. Disconnect the fan cable from the system board and completely lift the fan off the palm-rest and keyboard assembly.

Installing the fan

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 fan and provides a visual representation of the installation procedure.

Removing and installing components 23

Steps

1. Connect the fan cable to the system board.

2. Align the screw holes on the fan with the screw holes on the palm-rest and keyboard assembly.

3. Replace the two (M2x3) screws that secure the fan to the palm-rest and keyboard assembly.

4. Connect the I/O-board cable to the system board and I/O board.

NOTE: This step is only applicable for computers shipped with a WWAN configuration.

Next steps

1. Install the battery.

2. Install the base cover.

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

24 Removing and installing components

Speakers

Removing the speakers

Prerequisites

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

2. Remove the base cover.

3. Remove the battery.

About this task

The following image indicates the location of speakers and provides a visual representation of the removal procedure.

Steps

1. Open the latch and disconnect the touchpad cable from the system board.

2. Disconnect the speaker cable from the system board.

3. Peel the tapes that secure the speaker cable to the palm-rest and keyboard assembly.

4. Note the routing of the speaker cable and remove the speaker cable from the routing guides on the palm-rest and keyboard assembly.

Removing and installing components 25

NOTE: Note the position of the rubber grommets before lifting the speakers.

5. 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 speakers and provides a visual representation of the installation procedure.

Steps

1. Using the alignment posts and rubber grommets, place the speakers in the slots on the palm-rest and keyboard assembly.

2. Route the speaker cable through the routing guides on the palm-rest and keyboard assembly.

3. Adhere the tapes that secure the speaker cable to the palm-rest and keyboard assembly.

4. Connect the speaker cable to the system board.

5. Connect the touchpad cable to the system board and close the latch to secure the cable.

26 Removing and installing components

Next steps

1. Install the battery.

2. Install the base cover.

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

WLAN card

Removing the WLAN card

Prerequisites

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

2. Remove the base cover.

3. Remove the battery.

About this task

The following image indicates the location of WLAN card and provides a visual representation of the removal procedure.

Steps

1. Remove the screw (M2x2.5) that secures the WLAN-card bracket to the WLAN card and lift the WLAN-card bracket off the WLAN

card.

2. Disconnect the antenna cables from the WLAN card.

3. Slide and remove the WLAN card from the WLAN-card slot.

Installing the WLAN card

Prerequisites

If you are replacing a component, remove the existing component before performing the installation procedure.

Removing and installing components 27

About this task

The following image indicates the location of WLAN card and provides a visual representation of the installation procedure.

Steps

1. Connect the antenna cables to the WLAN card.

2. Align the notch on the WLAN card with the tab on the WLAN card slot and insert the WLAN card at an angle into the WLAN card slot.

3. Align and place the WLAN card bracket on the WLAN card.

4. Replace the screw (M2x2.5) to secure the WLAN card bracket to the WLAN card.

Next steps

1. Install the battery.

2. Install the base cover.

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

WWAN card

Removing the WWAN card

Prerequisites

NOTE: This procedure is only applicable for computers shipped with a WWAN configuration.

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

2. Remove the base cover.

3. Remove the battery.

About this task

The following image indicates the location of WWAN card and provides a visual representation of the removal procedure.

28 Removing and installing components

Steps

1. Remove the screw (M2x2.5) that secures the WWAN card bracket to the WWAN card.

2. Note the alignment of the WWAN-card bracket before lifting it off the WWAN card.

3. Disconnect the antenna cables from the WWAN card.

4. Slide and remove the WWAN card from the WWAN card slot.

Installing the WWAN card

Prerequisites

NOTE: This procedure is only applicable for computers shipped with a WWAN configuration.

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 WWAN card and provides a visual representation of the installation procedure.

Removing and installing components 29

Steps

1. Align the notch on the WWAN card with the tab on the WWAN-card slot and insert the WWAN card at an angle into the WWAN-card

slot.

2. Connect the antenna cables to the WWAN card and align the WWAN-card bracket on the WWAN card.

3. Replace the screw (M2x2.5) that secures the WWAN bracket to the WWAN card.

Next steps

1. Install the battery.

2. Install the base cover.

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

Touchpad

Removing the touchpad

Prerequisites

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

2. Remove the base cover.

3. Remove the battery.

About this task

The following image indicates the location of touchpad and provides a visual representation of the removal procedure.

30 Removing and installing components

Steps

1. Peel the tapes that secure the touchpad to the palm-rest and keyboard assembly.

2. Open the latch and disconnect the touchpad cable from the system board.

3. Remove the three (M1.6x2) screws that secure the touchpad bracket to the palm-rest and keyboard assembly.

4. Lift the touchpad bracket off the palm-rest and keyboard assembly.

5. Remove the two (M1.6x2) screws that secure the touchpad to the palm-rest and keyboard assembly.

6. Lift the touchpad, along with the cable, off the palm-rest and keyboard assembly.

Installing the touchpad

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 touchpad and provides a visual representation of the installation procedure.

Removing and installing components 31

Steps

1. Align and place the touchpad into the slot on the palm-rest and keyboard assembly.

2. Replace the two (M1.6x2) screws that secure the touchpad to the palm-rest and keyboard assembly.

3. Align and place the touchpad bracket into the slot on the palm-rest and keyboard assembly.

4. Replace the three (M1.6x2) screws that secure the touchpad bracket to the palm-rest and keyboard assembly.

5. Slide the touchpad cable into its connector on the system board and close the latch to secure the cable.

6. Adhere the tape that secures the touchpad to the palm-rest and keyboard assembly.

Next steps

1. Install the battery.

2. Install the base cover.

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

32 Removing and installing components

Power-adapter port

Removing the power-adapter port

Prerequisites

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

2. Remove the base cover.

3. Remove the battery.

About this task

The following image indicates the location of power-adapter port and provides a visual representation of the removal procedure.

Steps

1. Remove the screw (M2.5x3.5) that secures the display-cable bracket to the system board.

2. Remove the screw (M2x4) that secures the right display hinge to the system board.

3. Open the display hinges at an angle of 90 degrees.

4. Disconnect the power-adapter port cable from the system board.

5. Remove the screw (M2x3) that secures the power-adapter port to the palm-rest and keyboard assembly.

6. Lift the power-adapter port, along with its cable, off the palm-rest and keyboard assembly.

Installing the power-adapter port

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 power-adapter port and provides a visual representation of the installation procedure.

Removing and installing components 33

Steps

1. Connect the power-adapter port cable to the system board.

2. Replace the screw (M2x3) that secures the power-adapter port to the palm-rest and keyboard assembly.

3. Align and place the display-cable bracket on the system board.

4. Replace the screw (M2.5x3.5) that secure the display-cable bracket to the system board.

5. Using the alignment posts, close the display hinges.

6. Replace the screw (M2x4) that secure the right display hinge to the system board.

Next steps

1. Install the battery.

2. Install the base cover.

3. 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 base cover.

3. Remove the battery.

About this task

The following image indicates the location of display assembly and provides a visual representation of the removal procedure.

34 Removing and installing components

Removing and installing components 35

Steps

1. Remove the screw (M2.5x3.5) that secures the display-cable bracket to the system board.

2. Lift the display-cable bracket off the system board.

3. Using the pull tab, disconnect the display cable from the system board.

4. Remove the two screws (M2.5x3.5) that secure the left display hinge to the I/O board and palm-rest and keyboard assembly.

5. Remove the screw (M2x4) that secures the right display hinge to the system board.

6. Open the display hinges at an angle of 90 degrees.

7. Remove the palm-rest and keyboard assembly off the display assembly.

36 Removing and installing components

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 image indicates the location of display assembly and provides a visual representation of the installation procedure.

Removing and installing components 37

Steps

1. Align and place the palm-rest and keyboard assembly on the display assembly.

2. Using the alignment posts, close the display hinges.

3. Replace the two screws (M2.5x3.5) that secures the left display hinge to the I/O board and palm-rest and keyboard assembly.

4. Replace the screw (M2x4) that secures the right display hinge to the system board.

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

6. Align and place the display-cable bracket on the display cable.

7. Replace the screw (M2x4) that secures the display-cable bracket to the system board.

Next steps

1. Install the battery.

2. Install the base cover.

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

38 Removing and installing components

I/O board

Removing the I/O board

Prerequisites

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

2. Remove the base cover.

3. Remove the battery.

4. Remove the fan.

About this task

The following image indicates the location of I/O board and provides a visual representation of the removal procedure.

Steps

1. Remove the two screws (M2.5x3.5) that secure the left display hinge to the I/O board and palm-rest and keyboard assembly.

2. Open the display hinges at an angle of 90 degrees.

3. Peel the tape that secures the I/O-board cable to the I/O board.

Removing and installing components 39

4. Open the latch and disconnect the I/O-board cable from the I/O board.

5. Remove the screw (M2.5x2.5) that secures the I/O board to the palm-rest and keyboard assembly.

6. Remove the screw (M2x3) that secures the I/O board to the palm-rest and keyboard assembly.

7. Lift the I/O board off the palm-rest and keyboard assembly.

Installing the I/O board

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 I/O board and provides a visual representation of the installation procedure.

Steps

1. Align and place the I/O board on the palm-rest and keyboard assembly.

2. Replace the screw (M2x3) that secures the I/O board to the palm-rest and keyboard assembly.

3. Replace the screw (M2.5x2.5) that secures the I/O board to the palm-rest and keyboard assembly.

4. Connect the I/O-board cable to the I/O board and close the latch to secure the cable.

40 Removing and installing components

5. Adhere the tape that secures the I/O board to the I/O board.

6. Using the alignment posts, close the display hinges.

7. Replace the two screws (M2.5x3.5) that secure the left display hinge to the I/O board and palm-rest and keyboard assembly.

Next steps

1. Install the fan.

2. Install the battery.

3. Install the base cover.

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

Power-button board

Removing the power-button board

Prerequisites

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

2. Remove the base cover.

3. Remove the battery.

4. Remove the WLAN card.

5. Remove the fan.

6. Remove the I/O board.

About this task

The following image indicates the location of power button and provides a visual representation of the removal procedure.

Steps

1. Remove the screw (M1.6x2) that secures the power-button bracket to the palm-rest and keyboard assembly.

2. Remove the screw (M1.6x2) that secures the power-button board to the palm-rest and keyboard assembly and lift the power-button

board off the palm-rest and keyboard assembly.

Removing and installing components 41

Installing the power-button board

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 power-button board and provides a visual representation of the installation procedure.

Steps

1. Align the screw hole on the power-button board with the screw hole on the palm-rest and keyboard assembly.

2. Replace the screw (M1.6x2) that secures the power-button board to the palm-rest and keyboard assembly.

3. Align the screw hole on the power-button bracket with the screw hole on the palm-rest and keyboard assembly.

4. Replace the screw (M1.6x2) that secures the power-button bracket to the palm-rest and keyboard assembly.

Next steps

1. Install the I/O board.

2. Install the fan.

3. Install the WLAN card.

4. Install the battery.

5. Install the base cover.

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

Power button with fingerprint reader

Removing the power button with fingerprint reader

Prerequisites

NOTE: This procedure is only applicable for computers shipped with a fingerprint reader.

42 Removing and installing components

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

2. Remove the base cover.

3. Remove the battery.

4. Remove the WLAN card.

5. Remove the fan.

6. Remove the I/O board.

About this task

The following image indicates the location of power button with fingerprint reader and provides a visual representation of the removal

procedure.

Steps

1. Remove the screw (M1.6x2) that secures the power-button bracket to the palm-rest and keyboard assembly.

2. Remove the screw (M1.6x2) that secures the power button with fingerprint reader to the palm-rest and keyboard assembly.

3. Open the latch and disconnect the fingerprint-reader cable from the fingerprint-reader board.

4. Lift the power button with fingerprint-reader, along with the power-button cable, off the palm-rest and keyboard assembly.

5. Lift the power button with fingerprint-reader, along with the power-button cable, off the palm-rest and keyboard assembly.

Installing the power button with fingerprint reader

Prerequisites

NOTE: This procedure is only applicable for computers shipped with a fingerprint reader.

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 power button with fingerprint reader and provides a visual representation of the installation

procedure.

Removing and installing components 43

Steps

1. Align and place the power button with fingerprint reader on the palm-rest and keyboard assembly.

2. Replace the screw (M1.6x2) that secure the power button with fingerprint reader to the palm-rest and keyboard assembly.

3. Connect the fingerprint-reader cable to the fingerprint-reader board and close the latch to secure the cable.

4. Align and place the power-button bracket on the palm-rest and keyboard assembly.

5. Replace the screw (M1.6x2) that secure the power-button bracket to the palm-rest and keyboard assembly.

Next steps

1. Install the I/O board.

2. Install the fan.

3. Install the WLAN card.

4. Install the battery.

5. Install the base cover.

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 base cover.

3. Remove the battery.

4. Remove the M.2 2280 solid-state drive or M,2 2230 solid-state drive, whichever applicable.

5. Remove the WLAN card.

6. Remove the fan.

7. Remove the heat sink.

44 Removing and installing components

About this task

The following image indicates the location of system board and provides a visual representation of the removal procedure.

Steps

1. Remove the screw (M2x4) screw that secures the right display hinge to the system board.

2. Remove the screw (M2x4) that secures the display-cable bracket to the system board.

3. Remove the screw (M2.5x3.5) screw that secures the USB Type-C port bracket to the system board.

4. Peel the tape that secures the I/O-board cable to the system board.

5. Open the latch and disconnect the I/O-board cable from the system board.

6. Disconnect the speaker cable from the system board.

7. Open the latch and disconnect the fingerprint-reader cable from the system board.

8. Open the latch and disconnect the touchpad cable from the system board.

9. Open the latch and disconnect the keyboard cable from the system board.

10. Open the latch and disconnect the keyboard backlit cable from the system board.

11. Disconnect the coin-cell battery cable from the system board.

12. Disconnect the power-adapter port cable from the system board.

13. Using the pull tab, disconnect the display cable from the system board.

14. Gently release the ports on the system board from the slots on the palm-rest and keyboard assembly and lift the system board off the

palm-rest and keyboard assembly.

Removing and installing components 45

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 image indicates the location of system board and provides a visual representation of the installation procedure.

Steps

1. Slide the ports on the system board into the slots on the palm-rest and keyboard assembly and align the screw holes on the system

board with the screw holes on the palm-rest and keyboard assembly.

2. Replace the screw (M2x4) that secures the system board to palm-rest and keyboard assembly.

3. Connect the display cable on to the connector on the system board6

4. Connect the power-adapter port cable to the system board.

5. Connect the coin-cell battery cable to the system board.

6. Connect the keyboard backlit cable to the system board and close the latch to secure the cable.

7. Connect the keyboard cable to the system board and close the latch to secure the cable.

8. Connect the touchpad cable to the system board and close the latch to secure the cable.

46 Removing and installing components

9. Connect the fingerprint-reader cable to the system board and close the latch to secure the cable.

10. Connect the speaker cable to the system board.

11. Connect the I/O-board cable to the system board and close the latch to secure the cable.

12. Adhere the tape that secures the I/O-board cable to the system board.

13. Replace the screw (M2x4) screw that secures the right display hinge to the system board.

14. Replace the screw (M2x4) that secures the display-cable bracket to the system board.

15. Replace the screw (M2.5x3.5) screw that secures the USB Type-C port bracket to the system board.

Next steps

1. Install the power-adapter port.

2. Install the display assembly.

3. Install the heat sink.

4. Install the fan.

5. Install the WLAN card.

6. Install the M.2 2280 solid-state drive or M.2 2230 solid-state drive, whichever applicable.

7. Install the battery.

8. Install the base cover.

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

Display bezel

Removing the display bezel

Prerequisites

NOTE: This procedure is not applicable to computers shipped with a WWAN configuration.

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

2. Remove the base cover.

3. Remove the battery.

4. Remove the WLAN card.

5. Remove the display assembly.

About this task

The following image indicates the location of display bezel and provides a visual representation of the removal procedure.

Removing and installing components 47

Steps

1. Carefully pry the edges of the display bezel off the display back-cover and antenna assembly.

2. Remove the display bezel off the display back-cover and antenna assembly.

Installing the display bezel

Prerequisites

NOTE: This procedure is not applicable to computers shipped with a WWAN configuration.

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 display bezel and provides a visual representation of the installation procedure.

48 Removing and installing components

Steps

Align the display bezel with the display back-cover and antenna assembly, and gently snap the display bezel into place.

Next steps

1. Install the display assembly.

2. Install the WLAN card.

3. Install the battery.

4. Install the base cover.

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

Display panel

Removing the display panel

Prerequisites

NOTE: This procedure is not applicable to computers shipped with a WWAN configuration.

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

2. Remove the base cover.

3. Remove the battery.

4. Remove the WLAN card.

5. Remove the display assembly.

6. Remove the display bezel.

About this task

The following image indicates the location of display panel and provides a visual representation of the removal procedure.

Removing and installing components 49

50 Removing and installing components

Removing and installing components 51

Steps

1. Using a plastic scribe, slide out the pull tab of the SR tape from both sides of the display panel.

2. Pull out a small section of the SR tape.

3. Roll the SR tape around the plastic scribe.

NOTE: To avoid severing/breaking the SR tape, pull out only a small section of the SR tape and then roll the SR tape

around the scribe.

4. Lift the display panel off the display back-cover.

5. Peel the tape that secures the display cable to the display back-cover.

6. Open the latch and disconnect the display cable from the display back-cover.

Installing the display panel

Prerequisites

NOTE: This procedure is not applicable to computers shipped with a WWAN configuration.

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 display panel and provides a visual representation of the installation procedure.

52 Removing and installing components

Removing and installing components 53

Steps

1. Peel off the transparent protective films from the SR tapes.

2. Align and adhere both the SR tapes to the plastic edge of the display back-cover.

3. Peel off the blue protective films from the SR tapes.

4. Starting from the top, align and place the display panel on the display back-cover.

5. Remove the release paper from the pressure film.

6. Adhere the pressure film on the display panel.

7. Using the flat end of the plastic scribe or handle of the screwdriver, press and roll over the pressure films until they turn pink.

8. Peel off the pressure film from the display panel.

9. Place the display bezel on the display back-cover and snap it into place.

Next steps

1. Install the display bezel.

2. Install the display assembly.

3. Install the WLAN card.

4. Install the battery.

5. Install the base cover.

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

54 Removing and installing components

Display hinges

Removing the display hinges

Prerequisites

NOTE: This procedure is not applicable to computers shipped with a WWAN configuration.

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

2. Remove the base cover.

3. Remove the battery.

4. Remove the WLAN card.

5. Remove the display assembly.

6. Remove the display bezel.

About this task

The following image indicates the location of display hinges and provides a visual representation of the removal procedure.

Steps

1. Remove the four (M2.5x2.5) screws that secure the display hinges to the display back-cover.

2. Remove the two (M2x2) screws that secure the display hinges to the display back-cover.

3. Lift the display hinges off the display back-cover.

Installing the display hinges

Prerequisites

NOTE: This procedure is not applicable to computers shipped with a WWAN configuration.

If you are replacing a component, remove the existing component before performing the installation procedure.

Removing and installing components 55

About this task

The following image indicates the location of display hinges and provides a visual representation of the installation procedure.

Steps

1. Align the screw holes on the hinges with the screw holes on the display back-cover.

2. Replace the two (M2x2) screws that secure the display hinges to the display back-cover.

3. Replace the four (M2.5x2.5) screws to secure the display hinges to the display back-cover.

Next steps

1. Install the display bezel.

2. Install the display assembly.

3. Install the WLAN card.

4. Install the battery.

5. Install the base cover.

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

Camera

Removing the camera

Prerequisites

NOTE: This procedure is not applicable to computers shipped with a WWAN configuration.

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

2. Remove the base cover.

3. Remove the battery.

4. Remove the WLAN card.

5. Remove the display assembly.

6. Remove the display bezel.

7. Remove the display panel.

56 Removing and installing components

About this task

The following image indicates the location of camera and provides a visual representation of the removal procedure.

Steps

1. Peel the tape that secures the camera to the display back-cover

2. Using a plastic scribe, pry the camera from the alignment post on the display back-cover.

3. Turn over the camera and disconnect the camera cable off the camera.

4. Peel the tape off the camera and lift the camera off the display back-cover.

Installing the camera

Prerequisites

NOTE: This procedure is not applicable to computers shipped with a WWAN configuration.

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 camera and provides a visual representation of the installation procedure.

Removing and installing components 57

Steps

1. Adhere the camera to the display cable (tape) and connect the camera cable to the camera and turn it over.

2. Using the alignment post, turn the camera over and adhere to the display back-cover.

3. Adhere the tape that secures the camera 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 WLAN card.

5. Install the battery.

6. Install the base cover.

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

Display back-cover

Removing the display back-cover

Prerequisites

NOTE: This procedure is not applicable to computers shipped with a WWAN configuration.

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

2. Remove the base cover.

3. Remove the battery.

4. Remove the WLAN card.

5. Remove the display assembly.

6. Remove the display bezel.

7. Remove the display hinges.

8. Remove thedisplay panel.

9. Remove the display cable.

58 Removing and installing components

10. Remove the camera.

About this task

The following image indicates the display back-cover and provides a visual representation of the removal procedure.

Steps

After performing all the prerequisites, we are left with the display back-cover.

NOTE: Antenna cables are a part of the palm-rest and keyboard assembly for computers shipping with WLAN

configurations.

Installing the display back-cover

Prerequisites

NOTE: This procedure is not applicable to computers shipped with a WWAN configuration.

If you are replacing a component, remove the existing component before performing the installation procedure.

About this task

The following image indicates the display back-cover and provides a visual representation of the installation procedure.

Removing and installing components 59

Steps

Place the display back-cover on a flat surface.

NOTE: Antenna cables are a part of the palm-rest and keyboard assembly for computers shipping with WLAN

configurations.

Next steps

1. Install the camera.

2. Install the display cable.

3. Install the display panel.

4. Install the display hinges.

5. Install the display bezel.

6. Install the display assembly.

7. Install the WLAN card.

8. Install the battery.

9. Install the base cover.

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

Display cable

Removing the display cable

Prerequisites

NOTE: This procedure is not applicable to computers shipped with a WWAN configuration.

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

2. Remove the base cover.

3. Remove the battery.

4. Remove the display assembly.

5. Remove the display panel.

6. Remove the display bezel.

About this task

The following image indicates the location of display cable and provides a visual representation of the removal procedure.

60 Removing and installing components

Steps

1. Peel off the tape securing the display cable to the back-cover.

2. Peel the display cable off the display back-cover.

Installing the display cable

Prerequisites

NOTE: This procedure is not applicable to computers shipped with a WWAN configuration.

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 display cable and provides a visual representation of the installation procedure.

Removing and installing components 61

Steps

1. Adhere the tape securing the display cable to the back-cover.

2. Adhere the display cable to the display back-cover.

Next steps

1. Install the display bezel.

2. Install the display panel.

3. Install the display assembly.

4. Install the battery.

5. Install the base cover.

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

Palm-rest and keyboard assembly

Removing the palm-rest and keyboard assembly

Prerequisites

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

2. Remove the base cover.

3. Remove the battery.

4. Remove the WLAN card.

5. Remove the speakers.

6. Remove the system board.

7. Remove the display assembly.

8. Remove the power button with fingerprint reader or power-button board, whichever applicable.

9. Remove the power-adapter port.

10. Remove the touchpad.

62 Removing and installing components

About this task

The following image indicates the palm-rest and keyboard 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 and keyboard assembly.

NOTE: Antenna cables are a part of the display back-cover for computers shipping with WWAN configuration.

NOTE: System board can be removed with heatsink attached.

Installing the palm-rest and keyboard 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 and keyboard assembly and provides a visual representation of the installation procedure.

Removing and installing components 63

Steps

Place the palm-rest and keyboard assembly on a flat surface.

NOTE: Antenna cables are a part of the display back-cover for computers shipping with WWAN configuration.

Next steps

1. Install the touchpad.

2. Install the power-adapter port.

3. Install the power button with fingerprint reader or power-button board, whichever applicable.

4. Install the display assembly.

5. Install the system board.

6. Install the speakers.

7. Install the WLAN card.

8. Install the battery.

9. Install the base cover.

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

64 Removing and installing components

Device drivers

Intel Chipset Software Installation Utility

In the Device Manager, check if the chipset driver is installed.

Install the Intel chipset updates from www.dell.com/support.

Video drivers

In the Device Manager, check if the video driver is installed.

Install the video driver update from www.dell.com/support.

Intel Serial IO driver

In the Device Manager, check if the Intel Serial IO driver is installed.

Install the driver updates from www.dell.com/support.

Intel Trusted Execution Engine Interface

In the Device Manager, check if the Intel Trusted Execution Engine Interface driver is installed.

Install the driver update from www.dell.com/support.

Intel Virtual Button driver

In the Device Manager, check if the Intel Virtual Button driver is installed.

Install the driver updates from www.dell.com/support.

Wireless and Bluetooth drivers

In the Device Manager, check if the network card driver is installed.

Install the driver updates from www.dell.com/support.

In the Device Manager, check if the Bluetooth driver is installed.

Install the driver updates from www.dell.com/support.

Device drivers 65

System setup

NOTE: Depending on the computer and its installed devices, the items listed in this section may or may not be displayed.

Topics:

•System setup

•Entering BIOS setup program

•Navigation keys

•Boot Sequence

•System setup options

•Clearing CMOS settings

•Clearing BIOS (System Setup) and System passwords

System 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: 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

Steps

1. Turn on (or restart) your computer.

2. During POST, when the DELL logo is displayed, watch for the F2 prompt to appear, and then press F2 immediately.

NOTE: The F2 prompt indicates that the keyboard is initialized. This prompt can appear very quickly, so you must

watch for it, and then press F2. If you press F2 before the F2 prompt, this keystroke is lost. If you wait too long and

the operating system logo appears, continue to wait until you see the desktop. Then, turn off your computer and try

again.

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.

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.

66 System setup

Keys Navigation

Tab Moves to the next focus area.

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.

Boot Sequence

Boot Sequence allows you to bypass the System Setup–defined boot device order and boot directly to a specific device (for example:

optical drive or hard drive). During the Power-on Self Test (POST), when the Dell logo appears, you can:

• Access System Setup by pressing F2 key

• Bring up the one-time boot menu by pressing F12 key

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)

• STXXXX Drive (if available)

NOTE: XXX denotes the SATA drive number.

• Optical Drive (if available)

• SATA Hard Drive (if available)

• Diagnostics

NOTE: Choosing Diagnostics, will display the ePSA diagnostics screen.

The boot sequence screen also displays the option to access the System Setup screen.

System setup options

NOTE: Depending on this computer and its installed devices, the items that are listed in this section may or may not be

displayed.

Table 2. System setup options—System information menu

Overview

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.

Ownership Tag Displays the ownership 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.

Battery Displays the battery health information.

Primary Displays the primary battery.

Battery Level Displays the battery level.

Battery State Displays the battery state.

Health Displays the battery health.

AC Adapter Displays whether an AC adapter is installed.

Processor Information

System setup 67

Overview

Processor Type Displays the processor type.

Maximum Clock Speed Displays the maximum processor clock speed.

Core Count Displays the number of cores on the processor.

Processor L2 Cache Displays the processor L2 Cache size.

Processor ID Displays the processor identification code.

Processor L3 Cache Displays the processor L3 Cache size.

Current Clock Speed Displays the current processor clock speed.

Minimum Clock Speed Displays the minimum processor clock speed.

Microcode Version Displays the microcode version.

Intel Hyper-Threading Capable Displays whether the processor is Hyper-Threading (HT) capable.

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 that is used for the memory.

Device Information

Video Controller Displays the integrate graphics information of the computer.

dGPU Video Controller Displays the discrete graphics information of the computer.

Video BIOS Version Displays the video BIOS version of the computer.

Video Memory Displays the video memory information of the computer.

Panel Type Displays the Panel Type of the computer.

Native Resolution Displays the native resolution of the computer.

Audio Controller Displays the audio controller information of the computer.

Wi-Fi Device Displays the wireless device information of the computer.

Bluetooth Device Displays the Bluetooth device information of the computer.

Table 3. System setup options—Boot options menu

Boot options

Advanced Boot Options

Enable UEFI Network Stack Enables or disables UEFI Network Stack.

Default: OFF.

Boot Mode

Boot Mode: UEFI only Displays the boot mode of this computer.

Enable Boot Devices Enables or disables boot devices for this computer.

Boot Sequence Displays the boot sequence.

BIOS Setup Advanced Mode Enables or disables advanced BIOS settings.

Default: ON.

68 System setup

Boot options

UEFI Boot Path Security Enables or disables the system to prompt the user to enter the Admin password

when booting a UEFI boot path from the F12 boot menu.

Default: Always Except Internal HDD.

Table 4. System setup options—System Configuration menu

System Configuration

Date/Time

Date Sets the computer date in MM/DD/YYYY format. Changes to the date take effect

immediately.

Time Sets the computer time in HH/MM/SS 24-hour format. You can switch between 12-

hour and 24-hour clock. Changes to the time take effect immediately.

Enable SMART Reporting Enables or disables SMART (Self-Monitoring, Analysis, and Reporting Technology)

during computer startup to report hard drive errors.

Default: OFF.

Enable Audio Enables or disables all integrated audio controller.

Default: ON.

Enable Microphone Enables or disables microphone.

Default: ON.

Enable Internal Speaker Enables or disables internal speaker.

Default: ON.

USB Configuration

Enable Boot Support Enables or disables booting from USB mass storage devices such as external hard

drive, optical drive, and USB drive.

Enable External USB Ports Enables or disables USB ports to be functional in an operating system environment.

SATA Operation Configures operating mode of the integrated SATA hard drive controller.

Default: RAID. SATA is configured to support RAID (Intel Rapid Restore Technology).

Drives Enables or disables various onboard drives.

M.2 PCIe SSD-0/SATA-2 Default: ON.

SATA-0 Default: ON.

Drive Information Displays the information of various onboard drives.

Miscellaneous Devices Enables or disables various onboard devices.

Enable Camera Enables or disables the camera.

Default: ON.

Keyboard Illumination Configures the operating mode of the keyboard illumination feature.

Default: Disabled. The keyboard illumination will always be off.

Keyboard Backlight Timeout on AC Configures the timeout value for the keyboard when an AC adapter is connected to

the computer. The keyboard backlight timeout value is only effect when the backlight

is enabled.

Default: 10 seconds.

System setup 69

System Configuration

Keyboard Backlight Timeout on Battery Configures the timeout value for the keyboard when the computer is running on

battery. The keyboard backlight timeout value is only effect when the backlight is

enabled.

Default: 10 seconds.

Touchscreen Enables or disables the touchscreen for the operating system.

NOTE: Touchscreen will always work in the BIOS setup irrespective of

this setting.

Default: ON.

Table 5. System setup options—Video menu

Video

LCD Brightness

Brightness on battery power Sets the screen brightness when the computer is running on battery power.

Brightness on AC power Sets the screen brightness when the computer is running on AC power.

EcoPower Enables or disables EcoPower which increases the battery life by reducing the screen

brightness when appropriate.

Default: ON.

Table 6. System setup options—Security menu

Security

Enable Admin Setup Lockout Enables or disables the user from entering BIOS Setup when an Admin Password is

set.

Default: OFF.

Password Bypass Bypass the System (Boot) Password and the internal hard drive password prompts

during a system restart.

Default: Disabled.

Enable Non-Admin Password Changes Enables or disables the user to change the system and hard drive password without

the need for admin password.

Default: ON.

Non-Admin Setup Changes

Allow Wireless Switch Changes Enables or disables changes to the setup option when an Administrator password is

set.

Default: OFF.

Enable UEFI Capsule Firmware Updates Enables or disables BIOS updates through UEFI capsule update packages.

Computrace Enable or disable the BIOS module interface of the optional Computrace(R) Service

from Absolute Software.

Intel Platform Trust Technology On Enables or disables Platform Trust Technology (PTT) visibility to the operating

system.

Default: ON.

PPI Bypass for Clear Commands Enables or disables the operating system to skip BIOS Physical Presence Interface

(PPI) user prompts when issuing the Clear command.

Default: OFF.

Clear Enables or disables the computer to clear the PTT owner information, and returns the

PTT to the default state.

Default: OFF.

70 System setup

Security

Intel SGX Enables or disables the Intel Software Guard Extensions (SGX) to provide a secured

environment for running code/storing sensitive information.

Default: Software Control

SMM Security Mitigation Enables or disables additional UEFI SMM Security Mitigation protections.

Default: OFF.

NOTE: This feature may cause compatibility issues or loss of

functionality with some legacy tools and applications.

Enable Strong Passwords Enables or disables strong passwords.

Default: OFF.

Password Configuration Control the minimum and maximum number of characters that are allowed for Admin

and System passwords.

Admin Password Sets, Changes, or deletes the administrator (admin) password (sometimes called the

"setup" password).

System Password Sets, Changes, or deletes the system password.

Enable Master Password Lockout Enables or disables the master password support.

Default: OFF.

Table 7. System setup options—Secure Boot menu

Secure Boot

Enable Secure Boot Enables or disables the computer to boos using only validated boot software.

Default: OFF.

NOTE: For Secure Boot to be enabled, the computer needs to be in UEFI

boot mode and the Enable Legacy Option ROMs option needs to be

turned off.

Secure Boot Mode Selects the Secure Boot operation mode.

Default: Deployed Mode.

NOTE: Deployed Mode should be selected for normal operation of Secure

Boot.

Table 8. System setup options—Expert Key Management menu

Expert Key Management

Enable Custom Mode Enables or disables the keys in the PK, KEK, db, and dbx security key databases to be

modified.

Default: OFF.

Custom Mode Key Management Selects the custom values for expert key management.

Default: PK.

Table 9. System setup options—Performance menu

Performance

Intel Hyper-Threading Technology Enables or disables the Intel Hyper-Threading Technology to use processor resources

more efficiently.

Default: ON.

System setup 71

Performance

Intel SpeedStep Enables or disables the Intel SpeedStep Technology to dynamically adjust processor

voltage and core frequency, decreasing average power consumption and heat

production.

Default: ON.

Intel TurboBoost Technology Enabled or disabled the Intel TurboBoost mode of the processor. If enabled, the Intel

TurboBoost driver increases the performance of the CPU or graphics processor.

Default: ON.

Multi-Core Support Changes the number of CPU cores available to the operating system. The default

value is set to the maximum number of cores.

Default: All Cores.

Enable C-State Control Enables or disables the CPU's ability to enter and exit low-power states.

Default: ON.

Table 10. System setup options—Power Management menu

Power Management

Wake on AC Enables the computer to turn on and go to boot when AC power is supplied to the

computer.

Default: OFF.

Auto on Time Enables the computer to automatically power on for defined days and times.

Default: Disabled. The system will not automatically power up.

Battery Charge Configuration Enables the computer to run on battery during power usage hours. Use the below

options to prevent AC power usage between certain times of each day.

Default: Adaptive. Battery settings are adaptively optimized based on your typical

battery usage pattern.

Enable Advanced Battery Charge

Configuration

Enables Advanced Battery Charge Configuration from the beginning of the day to a

specified work period. Advanced Battery Charged maximizes battery health while still

supporting heavy use during the work day.

Default: OFF.

Block Sleep Blocks the computer from entering Sleep (S3) mode in the operating system.

Default: OFF.

NOTE: If enabled, the computer will not go to sleep, Intel Rapid Start will

be disabled automatically, and the operating system power option will be

blank if it was set to Sleep.

Enable USB Wake Support Enables the USB devices to wake the computer from Standby mode.

Default: OFF.

Enable Intel Speed Shift Technology Enables or disables Intel Speed Shift Technology support which enables the operating

system to select the appropriate processor performance automatically.

Default: ON.

Lid Switch Enables the computer to power up from the off state whenever the lid is opened.

Default: ON.

72 System setup

Table 11. System setup options—Wireless menu

Wireless

Wireless Switch Determines which wireless devices can be controlled by the Wireless Switch. For

Windows 8 systems, this is controlled by an operating system drive directly. As a

result, the setting does not affect the Wireless Switch behavior.

NOTE: When both WLAN and WiGig are present, enable/disable controls

are tied together. Thus, they cannot be enabled or disabled

independently.

WLAN Default: ON.

Bluetooth Default: ON.

Wireless Device Enable Enable or disable internal WLAN/Bluetooth devices.

WLAN Default: ON.

Bluetooth Default: ON.

Table 12. System setup options—POST Behavior menu

POST Behavior

Numlock Enable Enables or disables Numlock when the computer boots.

Default: ON.

Enable Adapter Warnings Enables the computer to display adapter warning messages during boot.

Default: ON.

Extend BIOS POST Time Configures the BIOS POST (Power-On Self-Test) load time.

Default: 0 seconds.

Fastboot Configures the speed of the UEFI boot process.

Default: Thorough. Performs complete hardware and configuration initialization during

boot.

Fn Lock Options Enables or disables the Fn lock mode.

Default: ON.

Lock Mode Default: Lock Mode Secondary. Lock Mode Secondary = If this option is selected, the

F1-F12 keys scan the code for their secondary functions.

Pull Screen Logo Enabled or disabled the computer to display full screen logo if the image match

screen resolution.

Default: OFF.

Warnings and Errors Selects an action on encountering a warning or error during boot.

Default: Prompt on Warnings and Errors. Stop, prompt and wait for user input when

warnings or errors are detected.

NOTE: Errors deemed critical to the operation of the computer hardware

will always halt the computer.

Table 13. System setup options—Virtualization menu

Virtualization

Intel Virtualization Technology Enables the computer to run a virtual machine monitor (VMM).

Default: ON.

System setup 73

Virtualization

VT for Direct I/O Enables the computer to perform Virtualization Technology for Direct I/O (VT-d).

VT-d is an Intel method that provides virtualization for memory map I/O.

Default: ON.

Table 14. System setup options—Maintenance menu

Maintenance

Asset Tag Creates a system Asset Tag that can be used by an IT administrator to uniquely

identify a particular system. Once set in BIOS, the Asset Tag cannot be changed.

Service Tag Displays the Service Tag of the computer.

BIOS Recovery from Hard Drive Enables the computer to recover from a bad BIOS image, as long as the Boot Block

portion is intact and functioning.

Default: ON.

NOTE: BIOS recovery is designed to fix the main BIOS block and cannot

work if the Boot Block is damaged. In addition, this feature cannot work

in the event of EC corruption, ME corruption, or a hardware issue. The

recovery image must exist on an unencrypted partition on the drive.

BIOS Auto-Recovery Enables the computer to automatically recover the BIOS without user actions. This

feature requires BIOS Recovery from Hard Drive to be set to Enabled.

Default: OFF.

Start Data Wipe CAUTION: This Secure Wipe Operation will delete information in a way

that it cannot be reconstructed.

If enabled, the BIOS will queue up a data wipe cycle for storage devices that are

connected to the motherboard on the next reboot.

Default: OFF.

Allow BIOS Downgrade Controls flashing of the system firmware to previous revisions.

Default: ON.

Table 15. System setup options—System Logs menu

System Logs

Power Event Log Displays Power events.

Default: Keep.

BIOS Event Log Displays BIOS events.

Default: Keep.

Thermal Event Log Displays Thermal events.

Default: Keep.

Table 16. System setup options—SupportAssist menu

SupportAssist

Dell Auto operating system Recovery

Threshold

Controls the automatic boot flow for SupportAssist System Resolution Console and

for Dell operating system Recovery tool.

Default: 2.

SupportAssist operating system Recovery Enables or disables the boot flow for SupportAssist operating system Recovery tool

in the even of certain system errors.

Default: ON.

74 System setup

Clearing CMOS settings

About this task

CAUTION: Clearing CMOS settings will reset the BIOS settings on your computer.

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.

System setup 75

Troubleshooting

Enhanced Pre-Boot System Assessment (ePSA)

diagnostics

About this task

The ePSA diagnostics (also known as system diagnostics) performs a complete check of your hardware. The ePSA is embedded with the

BIOS and is launched by the BIOS internally. The embedded system diagnostics provides a set of options for particular devices or device

groups allowing you to:

• Run tests automatically or in an interactive mode

• Repeat tests

• Display or save test results

• Run thorough tests to introduce additional test options to provide extra information about the failed device(s)

• View status messages that inform you if tests are completed successfully

• View error messages that inform you of problems encountered during testing

NOTE: Some tests for specific devices require user interaction. Always ensure that you are present at the computer

terminal when the diagnostic tests are performed.

Running the ePSA diagnostics

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.

System diagnostic lights

Battery-status light

Indicates the power and battery-charge status.

Solid white — Power adapter is connected and the battery has more than 5 percent charge.

Amber — Computer is running on battery and the battery has less than 5 percent charge.

Off

• Power adapter is connected and the battery is fully charged.

• Computer is running on battery and the battery has more than 5 percent charge.

• Computer is in sleep state, hibernation, or turned off.

The power and battery-status light blinks amber along with beep codes indicating failures.

76 Troubleshooting

For example, the power and battery-status light blinks amber two times followed by a pause, and then blinks white three times followed by

a pause. This 2,3 pattern continues until the computer is turned off indicating no memory or RAM is detected.

The following table shows different power and battery-status light patterns and associated problems.

Table 17. LED codes

Diagnostic light codes Problem description

2,1 Processor failure

2,2 System board: BIOS or ROM (Read-Only Memory) failure

2,3 No memory or RAM (Random-Access Memory) detected

2,4 Memory or RAM (Random-Access Memory) failure

2,5 Invalid memory installed

2,6 System-board or chipset error

2,7 Display failure

2,8 Power rail failure. Replace system board

3,1 Coin-cell battery failure

3,2 PCI, video card/chip failure

3,3 Recovery image not found

3,4 Recovery image found but invalid

3,5 Power-rail failure

3,6 System BIOS Flash incomplete

3,7 Management Engine (ME) error

Camera status light: Indicates whether the camera is in use.

• Solid white — Camera is in use.

• Off — Camera is not in use.

Caps Lock status light: Indicates whether Caps Lock is enabled or disabled.

• Solid white — Caps Lock enabled.

• Off — Caps Lock disabled.

Diagnostics

Table 18. Diagnostics

M-BIST (Built-In Self-Test) L-BIST (LCD Built-In Self-Test)

Purpose of diagnostic tool Evaluates the health of the system

board, allowing users to assess

whether the system board is the

source of the problem if there is no

power, no video output, or if the

system does not start-up properly

(no POST).

Checks if the system board is supplying power to the

LCD display by performing an LCD Power Rail test, which

allows for isolation of "No Video" symptom to Mainboard,

LCD or Cable.

Trigger Pressing M key and power button Pressing D key and power button. Also automatically

initiated during POST. Automatically initiated during

POST

Indicator of fault Amber colored battery indicator LED Battery indicator LED blink error code [Amber, White] =

[2,8]

Repair instruction Indicates a problem with the system

board.

Indicates a problem with the system board.

Troubleshooting 77

M-BIST

About this task

The M-BIST (Built-In Self-Test) diagnostics tool allows users to diagnose system-board failures.

NOTE: M-BIST can be manually-initiated before POST (Power-On Self-Test).

How to run M-BIST?

M-BIST must be initiated from a power-off state with the computer either connected to the supplied AC power adapter or running on a

fully-charged battery.

Steps

1. From the power-off state, 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 LEDs exhibit two states:

a. OFF: No fault is detected with the system board.

b. AMBER: Indicates a problem with the system board.

LCD Built-In Self-Test (BIST)

About this task

LCD BIST is a diagnostic tool that helps you determine if a screen abnormality is an inherent problem with the LCD screen of the

computer, with the video card or with the computer's settings.

It is recommended to run BIST to isolate the cause of a screen abnormality if you encounter display issues such as:

• flickering

• distortion

• clarity issues

• fuzzy or blurry image

• horizontal or vertical lines

• color fading

Starting the LCD BIST test

Steps

1. Power off your computer.

2. Disconnect any peripherals connected to your computer. Connect only the supplied AC power adapter to your computer.

3. Ensure that the LCD screen is clean with no dust particles on the surface of the screen.

4. From the power-off state, press and hold the D key and power button to enter LCD BIST mode. Continue to hold the D key, until you

see color bars on the LCD screen.

5. The screen displays multiple color bars and the entire screen changes to red, green and blue. During this process, carefully inspect the

screen for any abnormalities.

6. Press Esc to exit.

NOTE: LCD BIST is also initiated when Enhanced Pre-Boot System Assessment (ePSA) diagnostics is launched. For

more information about ePSA, see Dell EPSA Diagnostic 3.0.

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 10 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.

78 Troubleshooting

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/

support.

Flashing BIOS (USB key)

Steps

1. Follow the procedure from step 1 to step 7 in "Flashing the BIOS" to download the latest BIOS setup program file.

2. Create a bootable USB drive. For more information see the knowledge base article SLN143196 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 when the Dell logo is displayed on the screen.

6. Boot to the USB drive from the One Time Boot Menu.

7. Type the BIOS setup program filename and press Enter.

8. The BIOS Update Utility appears. Follow the instructions on the screen to complete the BIOS update.

Flashing the BIOS

About this task

You may need to flash (update) the BIOS when an update is available or when you replace the system board.

Follow these steps to flash the BIOS:

Steps

1. Turn on your computer.

2. Go to www.dell.com/support.

3. Click Product support, enter the Service Tag of your computer, and then click Submit.

NOTE: If you do not have the Service Tag, use the auto-detect feature or manually browse for your computer model.

4. Click Drivers & downloads > Find it myself.

5. Select the operating system installed on your computer.

6. Scroll down the page and expand BIOS.

7. Click Download to download the latest version of the BIOS for your computer.

8. After the download is complete, navigate to the folder where you saved the BIOS update file.

9. Double-click the BIOS update file icon and follow the instructions on the screen.

Flea power release

About this task

Flea power is the residual static electricity that remains on the computer even after it has been powered off and the battery has been

removed. The following procedure provides the instructions on how to conduct flea power release:

Steps

1. Turn off your computer.

2. Remove the base cover.

3. Remove the battery.

4. Press and hold the power button for 15 seconds to drain the flea power.

5. Replace the battery.

6. Replace the base cover.

Troubleshooting 79

7. Turn on your computer.

Wi-Fi power cycle

About this task

If your computer is unable to access the Internet due to Wi-Fi connectivity issues a Wi-Fi power cycle procedure may be performed. The

following procedure provides the instructions on how to conduct a Wi-Fi 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.

80 Troubleshooting

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 19. Self-help resources

Self-help resources Resource location

Information about Dell products and services www.dell.com

My Dell

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

Troubleshooting information, user manuals, setup instructions,

product specifications, technical help blogs, drivers, software

updates, and so on.

www.dell.com/support

Dell knowledge base articles for a variety of computer concerns. 1. Go to www.dell.com/support.

2. Type the subject or keyword in the Search box.

3. Click Search to retrieve the related articles.

Learn and know the following information about your product:

• Product specifications

• Operating system

• Setting up and using your product

• Data backup

• Troubleshooting and diagnostics

• Factory and system restore

• BIOS information

See Me and My Dell at www.dell.com/support/manuals.

To locate the Me and My Dell relevant to your product, identify

your product through one of the following:

• Select Detect Product.

• Locate your product through the drop-down menu under View

Products.

• Enter the Service Tag number or Product ID in the search

bar.

Contacting Dell

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 on your purchase invoice,

packing slip, bill, or Dell product catalog.

Getting help and contacting Dell 81

Table of Contents

DELL 5391 User Manual

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