OptiPlex 7490 All-In-One Service Manual
Contents
Working inside your computer
- Safety instructions
Removing and installing components
Drivers and downloads
System setup
Troubleshooting
Getting help and contacting Dell

DELL 7490 User Manual

Displayed below is the user manual for 7490 by DELL which is a product in the All-in-One PCs/Workstations category. This manual has pages.

Related Manuals

DELL 7490 Manual

OptiPlex 7490 All-In-One

Service Manual

Regulatory Model: W26C

Regulatory Type: W26C003/W26C004

April 2021

Rev. A00

Notes, cautions, and warnings

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

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

the problem.

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

trademarks may be trademarks of their respective owners.

Chapter 1: Working inside your computer...................................................................................... 6

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

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

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

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

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

After working inside your computer..........................................................................................................................9

Chapter 2: Removing and installing components.......................................................................... 10

Recommended tools..........................................................................................................................................................10

Screw list............................................................................................................................................................................. 10

Major components of your computer............................................................................................................................12

Stand..................................................................................................................................................................................... 13

Removing the fixed stand.......................................................................................................................................... 13

Installing the fixed stand.............................................................................................................................................14

Removing the articulating stand...............................................................................................................................14

Installing the articulating stand.................................................................................................................................16

Removing the height adjustable stand.................................................................................................................... 17

Installing the height adjustable stand...................................................................................................................... 18

Cable cover—optional...................................................................................................................................................... 19

Removing the cable cover......................................................................................................................................... 19

Installing the cable cover............................................................................................................................................21

Back cover.......................................................................................................................................................................... 22

Removing the back cover..........................................................................................................................................22

Installing the back cover............................................................................................................................................24

Hard drive............................................................................................................................................................................25

Removing the hard drive........................................................................................................................................... 25

Installing the hard drive..............................................................................................................................................26

Memory modules............................................................................................................................................................... 27

Removing the memory modules............................................................................................................................... 27

Installing the memory modules................................................................................................................................. 28

System-board shield......................................................................................................................................................... 29

Removing the system-board shield.........................................................................................................................29

Installing the system-board shield...........................................................................................................................30

Solid-state drive................................................................................................................................................................. 31

Removing the M.2 2230 solid-state drive..............................................................................................................31

Installing the M.2 2230 solid-state drive............................................................................................................... 32

Removing the M.2 2280 solid-state drive/Intel Optane memory module..................................................... 33

Installing the M.2 2280 solid-state drive/Intel Optane memory module....................................................... 34

System fan..........................................................................................................................................................................35

Removing the system fan..........................................................................................................................................35

Installing the system fan............................................................................................................................................36

Coin-cell battery................................................................................................................................................................ 37

Removing the coin-cell battery................................................................................................................................ 37

Contents

Contents 3

Installing the coin-cell battery.................................................................................................................................. 38

Wireless card...................................................................................................................................................................... 39

Removing the wireless card...................................................................................................................................... 39

Installing the wireless card........................................................................................................................................ 40

Camera assembly...............................................................................................................................................................42

Removing the camera assembly.............................................................................................................................. 42

Installing the camera assembly.................................................................................................................................43

Bottom cover..................................................................................................................................................................... 44

Removing the bottom cover..................................................................................................................................... 44

Installing the bottom cover....................................................................................................................................... 45

Power-supply unit............................................................................................................................................................. 46

Removing the power-supply unit (PSU)................................................................................................................46

Installing the power-supply unit (PSU).................................................................................................................. 48

Power-supply fan.............................................................................................................................................................. 50

Removing the PSU fan...............................................................................................................................................50

Installing the PSU fan..................................................................................................................................................51

Heat sink..............................................................................................................................................................................52

Removing the heat sink—UMA............................................................................................................................... 52

Installing the heat sink—UMA................................................................................................................................. 53

Removing the heat sink—discrete..........................................................................................................................54

Installing the heat sink—discrete............................................................................................................................55

Processor............................................................................................................................................................................ 56

Removing the processor............................................................................................................................................56

Installing the processor.............................................................................................................................................. 57

Rear-I/O bracket...............................................................................................................................................................59

Removing the rear-I/O bracket............................................................................................................................... 59

Installing the rear-I/O bracket................................................................................................................................. 60

System board...................................................................................................................................................................... 61

Removing the system board......................................................................................................................................61

Installing the system board....................................................................................................................................... 63

Speakers.............................................................................................................................................................................. 65

Removing the speakers..............................................................................................................................................65

Installing the speakers................................................................................................................................................66

Power-button board......................................................................................................................................................... 68

Removing the power-button board........................................................................................................................ 68

Installing the power-button board...........................................................................................................................69

Microphones....................................................................................................................................................................... 70

Removing the microphones.......................................................................................................................................70

Installing the microphones..........................................................................................................................................71

Side I/O-board................................................................................................................................................................... 72

Removing the side I/O-board................................................................................................................................... 72

Installing the side I/O-board..................................................................................................................................... 73

Audio board......................................................................................................................................................................... 74

Removing the audio board.........................................................................................................................................74

Installing the audio board...........................................................................................................................................75

Antenna modules............................................................................................................................................................... 76

Removing the antenna modules...............................................................................................................................76

Installing the antenna modules................................................................................................................................. 78

Display panel....................................................................................................................................................................... 79

Removing the display panel.......................................................................................................................................79

4Contents

Installing the display panel......................................................................................................................................... 81

Middle frame.......................................................................................................................................................................84

Removing the middle frame...................................................................................................................................... 84

Installing the middle frame........................................................................................................................................ 86

Chapter 3: Drivers and downloads............................................................................................... 88

Chapter 4: System setup............................................................................................................. 89

BIOS overview................................................................................................................................................................... 89

Entering BIOS setup program........................................................................................................................................ 89

Boot Sequence...................................................................................................................................................................89

Navigation keys..................................................................................................................................................................89

System setup options.......................................................................................................................................................90

Updating the BIOS in Windows .................................................................................................................................... 98

Updating BIOS on systems with BitLocker enabled........................................................................................... 99

Updating your system BIOS using a USB flash drive..........................................................................................99

Updating the Dell BIOS in Linux and Ubuntu environments..................................................................................100

System and setup password.........................................................................................................................................100

Assigning a system setup password..................................................................................................................... 100

Deleting or changing an existing system setup password................................................................................101

Clearing CMOS settings................................................................................................................................................. 101

Clearing BIOS (System Setup) and System passwords..........................................................................................101

Chapter 5: Troubleshooting....................................................................................................... 102

Display built-in self test..................................................................................................................................................102

SupportAssist diagnostics............................................................................................................................................. 102

Running the SupportAssist Pre-Boot System Performance Check.............................................................. 102

Diagnostics........................................................................................................................................................................ 103

Recovering the operating system................................................................................................................................104

Flashing BIOS (USB key)............................................................................................................................................... 104

Flashing the BIOS............................................................................................................................................................ 104

WiFi power cycle..............................................................................................................................................................105

Flea power release.......................................................................................................................................................... 105

Chapter 6: Getting help and contacting Dell...............................................................................106

Contents 5

Working inside your computer

Safety instructions

Use the following safety guidelines to protect your computer from potential damage and to ensure your personal safety. Unless

otherwise noted, each procedure included in this document assumes that you have read the safety information that shipped

with your computer.

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.

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 Working inside your computer

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.

6. After the computer is unplugged, press and hold the power button for 5 seconds to ground the system board.

CAUTION: Place the computer on a flat, soft, and clean surface to avoid scratches on the display.

7. Place the computer face down.

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

Working inside your computer 7

is temporarily placed on the mat. The physical connection of the wrist strap and bonding wire between your skin, the ESD

mat, and the hardware is known as bonding. Use only Field Service kits with a wrist strap, mat, and bonding wire. Never

use wireless wrist straps. Always be aware that the internal wires of a wrist strap are prone to damage from normal wear

and tear, and must be checked regularly with a wrist strap tester in order to avoid accidental ESD hardware damage. It is

recommended to test the wrist strap and bonding wire at least once per week.

●ESD Wrist Strap Tester – The wires inside of an ESD strap are prone to damage over time. When using an unmonitored

kit, it is a best practice to regularly test the strap prior to each service call, and at a minimum, test once per week. A

wrist strap tester is the best method for doing this test. If you do not have your own wrist strap tester, check with your

regional office to find out if they have one. To perform the test, plug the wrist-strap's bonding-wire into the tester while it is

strapped to your wrist and push the button to test. A green LED is lit if the test is successful; a red LED is lit and an alarm

sounds if the test fails.

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

that are insulators and often highly charged.

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

example, deploying the kit for a server environment is different than for a desktop or portable environment. Servers are

typically installed in a rack within a data center; desktops or portables are typically placed on office desks or cubicles. Always

look for a large open flat work area that is free of clutter and large enough to deploy the ESD kit with additional space to

accommodate the type of system that is being repaired. The workspace should also be free of insulators that can cause an

ESD event. On the work area, insulators such as Styrofoam and other plastics should always be moved at least 12 inches or

30 centimeters away from sensitive parts before physically handling any hardware components.

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

bags are preferred. However, you should always return the damaged part using the same ESD bag and packaging that the

new part arrived in. The ESD bag should be folded over and taped shut and all the same foam packing material should be

used in the original box that the new part arrived in. ESD-sensitive devices should be removed from packaging only at an

ESD-protected work surface, and parts should never be placed on top of the ESD bag because only the inside of the bag is

shielded. Always place parts in your hand, on the ESD mat, in the system, or inside an anti-static bag.

●Transporting Sensitive Components – When transporting ESD sensitive components such as replacement parts or parts

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

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.

8Working inside your computer

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.

Working inside your computer 9

Removing and installing components

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

Recommended tools

The procedures in this document may require the following tools:

●Phillips screwdriver #1

●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 systems 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. OptiPlex 7490 All-in-One screw list

Component Screw type Quantity Screw image

Cable cover—optional M3x9 1

System-board shield M3x5 5

Bottom cover M3x5 4

M.2 2230 solid-state drive M2x2.5 1

M.2 2280 solid-state drive/

Intel Optane memory

M2x2.5 1

System fan M3x5 3

Wireless-card shield M2x2.5 2

Wireless card M2x2.5 1

10 Removing and installing components

Table 1. OptiPlex 7490 All-in-One screw list (continued)

Component Screw type Quantity Screw image

Camera assembly M3x5 2

Camera door M3x5 2

Heat sink—UMA Captive screws 5

Heat sink—Discrete Captive screws 9

Power-supply unit (PSU) M3x5 2

PSU fan M3x5 2

Rear-I/O bracket M3x5 4

System board M3x5 9

Speakers M3 4+7.1xZN 9

Power-button board M3x5 1

Microphones M2x2.5 4

Side I/O-board shield M3x5 2

Side-I/O board M2.5x3.5 2

Antenna modules M2x2.5 2

Display panel M3x5 12

Middle frame M3x5 16

Audio board M3x5 1

Removing and installing components 11

Major components of your computer

1. Stand

2. Bottom cover

3. Heat sink

4. Processor fan

5. Processor

6. Memory module

7. M.2 2230/2280 solid-state drive

8. Rear-I/O bracket

9. Side-I/O board

10. Speakers

11. Audio board

12. Display panel

13. Display-assembly base

14. Middle frame

15. Camera-assembly door

16. Power-supply unit (PSU)

17. System board

18. System-board shield

19. Camera assembly

20. Wireless card

21. PSU fan

12 Removing and installing components

22. Back cover

Stand

Removing the fixed stand

Prerequisites

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

CAUTION: When servicing the system, place it on an elevated, clean, and flat surface. Dell Technologies

recommends removing the stand to avoid accidental damage to the system display during servicing.

About this task

The following image provides a visual representation of the fixed stand removal procedure.

Steps

1. Press and slide the release button up.

2. Hold the button in the release position and lift the stand upward.

3. Slide the stand downward, to lift the stand off the back cover.

Removing and installing components 13

Installing the fixed stand

Prerequisites

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

About this task

The following image provides a visual representation of the fixed stand installation procedure.

Steps

Align and insert the hooks on the mounting bracket on the stand into the slots on the monitor, until you hear a click.

Next steps

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

Removing the articulating stand

Prerequisites

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

CAUTION: When servicing the system, place it on an elevated, clean, and flat surface. It is recommended to

remove the stand to avoid accidental damage to the system display during servicing.

14 Removing and installing components

About this task

The following image provides a visual representation of the articulating stand removal procedure.

Removing and installing components 15

Steps

1. Press and slide the release button up.

2. Hold the button in the release position, and lift the stand upward.

3. Slide the stand downward, to lift the stand off the back cover.

4. Pry the rubber feet from the bottom cover and pull it out.

Installing the articulating stand

Prerequisites

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

About this task

The following image provides a visual representation of the articulating stand installation procedure.

16 Removing and installing components

Steps

1. Align the rubber feet with the slots on the bottom cover and push it firmly in place.

2. Align the tabs on the stand with the slots on the back cover.

3. Snap the stand until it clicks into place.

Next steps

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

Removing the height adjustable stand

Prerequisites

NOTE: Follow the same procedure to remove the Height Adjustable Stand with Optical Disk Drive.

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

CAUTION: When servicing the system, place it on an elevated, clean, and flat surface. Dell recommends

removing the stand to avoid accidental damage to the system display during servicing.

About this task

The following image provides a visual representation of the height adjustable stand removal procedure.

Removing and installing components 17

Steps

1. Press and slide the release button up.

2. Hold the button in the release position, and lift the stand upward.

3. Slide the stand downward, to lift the stand off the back cover.

Installing the height adjustable stand

Prerequisites

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

NOTE: Follow the same procedure to install the Height Adjustable Stand with Optical Disk Drive.

About this task

The following image provides a visual representation of the height adjustable stand installation procedure.

18 Removing and installing components

Steps

1. Align the tabs on the stand with the slots on the back cover.

2. Slide the stand upward until it clicks into place.

Next steps

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

Cable cover—optional

Removing the cable cover

Prerequisites

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

CAUTION: When servicing the system, place it on an elevated, clean, and flat surface. It is recommended to

remove the stand to avoid accidental damage to the system display during servicing.

2. Remove the stand.

About this task

The following image provides a visual representation of the cable cover removal procedure.

Removing and installing components 19

Steps

1. Unroute the power cable from the slots on the cable cover.

2. Remove the screw (M3x9) that secures the cable cover to the bottom cover.

3. Lift the cable cover from the bottom cover.

20 Removing and installing components

Installing the cable cover

Prerequisites

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

About this task

The following image provides a visual representation of the cable cover installation procedure:

Removing and installing components 21

Steps

1. Route the power cable through the slots on the cable cover.

2. Align the screw hole on the cable cover with the screw hole on the bottom cover.

3. Replace the screw (M3x9) to secure the cable cover to the bottom cover.

Next steps

1. Install the stand.

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

Back cover

Removing the back cover

Prerequisites

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

CAUTION: When servicing the system, place it on an elevated, clean, and flat surface. It is recommended to

remove the stand to avoid accidental damage to the system display during servicing.

2. Remove the stand.

3. Remove the cable cover (optional).

About this task

The following image provides a visual representation of the back cover removal procedure.

22 Removing and installing components

Steps

1. Press and hold the release tab on the back cover to release it from the latch on the system-board shield.

2. Slide the back cover up to release the tabs on the cover from the slots on the middle frame.

3. Lift the back cover and remove it from the system.

Removing and installing components 23

Installing the back cover

Prerequisites

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

About this task

The following image provides a visual representation of the back cover installation procedure.

24 Removing and installing components

Steps

1. Place the back cover on the middle frame and system-board shield and align the tabs on the back cover with the slots on the

middle frame.

2. Slide the back cover to lock the release tab under the latch on the system-board shield.

Next steps

1. Install the cable cover (optional).

2. Install the stand.

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

Hard drive

Removing the hard drive

Prerequisites

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

2. Remove the stand.

3. Remove the cable cover (optional).

4. Remove the back cover.

About this task

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

Removing and installing components 25

Steps

1. Press down the tab securing the hard-drive assembly to the system-board shield.

2. Slide and lift the hard-drive assembly from the slot on the display-assembly base.

3. Pry the tabs on hard-drive bracket from its slots on the hard drive.

4. Remove the hard drive from the hard-drive bracket.

Installing the hard 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 hard drive and provides a visual representation of the installation procedure.

26 Removing and installing components

Steps

1. Align the tabs on the hard-drive bracket with the slots on the hard drive.

2. Flex the hard-drive bracket and replace the remaining tabs on the hard-drive bracket with the slots on the hard drive.

3. Place the hard-drive assembly into the slot and slide it to lock the hard-drive assembly on the display-assembly base.

Next steps

1. Install the back cover.

2. Install the cable cover (optional).

3. Install the stand.

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

Memory modules

Removing the memory modules

Prerequisites

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

2. Remove the stand.

3. Remove the cable cover (optional).

4. Remove the back cover.

About this task

The following image indicates the location of the memory modules and provides a visual representation of the removal

procedure.

Removing and installing components 27

Steps

1. Pry and remove the DIMM door from the system-board shield.

2. Using your fingertips, spread apart the securing clips on the memory-module slot until the memory module pops up.

3. Slide and remove the memory module from the memory-module slot.

NOTE: Repeat step 2 and 3 if there are two memory modules.

Installing the memory modules

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 memory module and provides a visual representation of the installation

procedure.

28 Removing and installing components

Steps

1. Align the notch on the memory module with the tab on the memory-module slot.

2. Slide the memory module firmly into the slot at an angle and press the memory module down until it clicks into place.

NOTE: If you do not hear the click, remove the memory module and reinstall it.

NOTE: Repeat step 1 and 2 if there are two memory modules.

3. Align the tabs on the DIMM door with the slots on the system-board shield and snap into place.

Next steps

1. Install the back cover.

2. Install the cable cover (optional).

3. Install the stand.

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

System-board shield

Removing the system-board shield

Prerequisites

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

2. Remove the stand.

3. Remove the cable cover (optional).

4. Remove the back cover.

About this task

The following image indicates the location of the system-board shield and provides a visual representation of the removal

procedure.

Removing and installing components 29

Steps

1. Remove the five screws (M3x5) that secure the system-board shield to the display-assembly base.

2. Lift the system-board shield off the display-assembly base.

Installing the system-board shield

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 system-board shield and provides a visual representation of the installation

procedure.

30 Removing and installing components

Steps

1. Align the screw holes on the system-board shield with the screw holes on the display-assembly base.

2. Replace the five screws (M3x5) to secure the system-board shield to the display-assembly base.

Next steps

1. Install the back cover.

2. Install the cable cover (optional).

3. Install the stand.

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

Solid-state drive

Removing the M.2 2230 solid-state drive

Prerequisites

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

2. Remove the stand.

3. Remove the cable cover (optional).

4. Remove the back cover.

5. Remove the system-board shield.

Removing and installing components 31

About this task

The following image indicates the location of the M.2 2230 solid-state drive and provides a visual representation of the removal

procedure.

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 M.2 card slot on the system board.

Installing the M.2 2230 solid-state drive

Prerequisites

CAUTION: Solid-state drives are fragile. Exercise care when handling the solid-state drive.

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 M.2 2230 solid-state drive and provides a visual representation of the

installation procedure.

32 Removing and installing components

Steps

1. Align the notch on the solid-state drive with the tab on the M.2 card slot.

2. Slide the solid-state drive into the M.2 card slot on the system board.

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

Next steps

1. Install the system-board shield.

2. Install the back cover.

3. Install the cable cover (optional).

4. Install the stand.

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

Removing the M.2 2280 solid-state drive/Intel Optane memory

module

Prerequisites

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

2. Remove the stand.

3. Remove the cable cover (optional).

4. Remove the back cover.

5. Remove the system-board shield.

About this task

The following image indicates the location of the M.2 2280 solid-state drive/Intel Optane memory module and provides a visual

representation of the removal procedure.

Removing and installing components 33

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 M.2 card slot on the system board.

Installing the M.2 2280 solid-state drive/Intel Optane memory

module

Prerequisites

CAUTION: Solid-state drives are fragile. Exercise care when handling the solid-state drive.

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 M.2 2280 solid-state drive/Intel Optane memory module and provides a visual

representation of the installation procedure.

34 Removing and installing components

Steps

1. Align the notch on the solid-state drive with the tab on the M.2 card slot.

2. Slide the solid-state drive into the M.2 card slot on the system board.

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

Next steps

1. Install the system-board shield.

2. Install the back cover.

3. Install the cable cover (optional).

4. Install the stand.

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

System fan

Removing the system fan

Prerequisites

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

2. Remove the stand.

3. Remove the cable cover (optional).

4. Remove the back cover.

5. Remove the system-board shield.

About this task

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

Removing and installing components 35

Steps

1. Disconnect the system-fan cable from the system board.

2. Remove the three screws (M3x5) that secure the system fan to the display-assembly base.

3. Lift the system fan, along with its cable, off the display-assembly base.

Installing the system 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 the system fan and provides a visual representation of the installation procedure.

36 Removing and installing components

Steps

1. Align the screw holes on the system fan with the screw holes on the display-assembly base.

2. Replace the three screws (M3x5) to secure the system fan to the display-assembly base.

3. Connect the system-fan cable to the connector on the system board.

Next steps

1. Install the system-board shield.

2. Install the back cover.

3. Install the cable cover (optional).

4. Install the stand.

5. 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.

2. Remove the stand.

3. Remove the cable cover (optional).

4. Remove the back cover.

5. Remove the system-board shield.

NOTE: Removing the coin-cell battery resets the CMOS and BIOS settings to default and results in data lose. It is

recommended that you note the CMOS and BIOS settings before removing the coin-cell battery.

About this task

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

Removing and installing components 37

Steps

1. Using the plastic scribe, press on the metal clip to release the coin-cell battery from the coin-cell battery holder.

2. Lift the coin-cell battery from the coin-cell battery holder.

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.

38 Removing and installing components

Steps

With the positive-side facing up, insert the coin-cell battery into the battery holder on the system board and gently press the

battery until it snaps into place.

Next steps

1. Install the system-board shield.

2. Install the back cover.

3. Install the cable cover (optional).

4. Install the stand.

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

Wireless card

Removing the wireless card

Prerequisites

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

2. Remove the stand.

3. Remove the cable cover (optional).

4. Remove the back cover.

5. Remove the system-board shield.

About this task

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

Removing and installing components 39

Steps

1. Remove the two screws (M2x2.5) that secure the wireless-card shield to the system board.

2. Unroute the antenna cables from the routing guides on the wireless-card shield.

3. Lift the wireless-card shield out of the system.

4. Remove the screw (M2x2.5) that secures the wireless-card bracket to the wireless card.

5. Slide and remove the wireless-card bracket off the wireless card.

6. Disconnect the antenna cables from the wireless card.

7. Slide and remove the wireless card from the wireless-card slot.

Installing the wireless card

Prerequisites

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

CAUTION: To avoid damage to the wireless card, route the antenna cables accurately.

About this task

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

40 Removing and installing components

Steps

1. Connect the antenna cables to the wireless card.

The following table provides the antenna-cable color scheme:

Table 2. Antenna-cable color scheme

Connectors on the

wireless card

Antenna-cable color Silkscreen marking

Main White MAIN △ (white triangle)

Auxiliary Black AUX ▲ (black triangle)

2. Place the wireless-card bracket on the wireless card.

3. Align the notch on the wireless card with the tab on the wireless-card slot.

4. Slide the wireless card at an angle into the wireless-card slot.

5. Replace the screw (M2x2.5) to secure the wireless card and wireless-card bracket to the display-assembly base.

6. Align and place the wireless-card shield on the system board and wireless card.

7. Replace the two screws (M2x2.5) to secure the wireless-card shield to the system board.

8. Route the antenna cables through the routing guides on the wireless-card shield.

Next steps

1. Install the system-board shield.

2. Install the back cover.

3. Install the cable cover (optional).

4. Install the stand.

Removing and installing components 41

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

Camera assembly

Removing the camera assembly

Prerequisites

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

2. Remove the stand.

3. Remove the cable cover (optional).

4. Remove the back cover.

5. Remove the system-board shield.

About this task

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

procedure.

42 Removing and installing components

Steps

1. Remove the two screws (M3x5) that secure the camera-assembly door to the display-assembly base.

2. Disconnect the camera cable from the connector on the system board.

3. Remove the two screws (M3x5) that secure the camera assembly to the middle frame.

4. Slide and remove the camera assembly from the middle frame.

5. Unroute the camera cable from the routing guides on the display-assembly base.

Installing the camera 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 the camera assembly and provides a visual representation of the installation

procedure.

Steps

1. Route the camera cable through the routing guides on the display-assembly base.

Removing and installing components 43

2. Slide the camera assembly on the middle frame, and align the screw holes on the camera assembly with the screw holes on

the middle frame.

3. Replace the two screws (M3x5) to secure the camera assembly to the middle frame.

4. Connect the camera cable to the system board.

5. Align the screw holes on the camera door with the screw holes on the display-assembly base.

6. Replace the two screws (M3x5) to secure the camera door to the display-assembly base.

Next steps

1. Install the system-board shield.

2. Install the back cover.

3. Install the cable cover (optional).

4. Install the stand.

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

Bottom cover

Removing the bottom cover

Prerequisites

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

2. Remove the stand.

3. Remove the cable cover (optional).

4. Remove the back cover.

5. Remove the system-board shield.

About this task

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

44 Removing and installing components

Steps

1. Remove the four screws (M3x5) that secure the bottom cover to the display-assembly base.

2. Pry and lift the bottom cover off the display-assembly base.

Installing the bottom 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 bottom cover and provides a visual representation of the installation

procedure.

Removing and installing components 45

Steps

1. Align the screw holes on the bottom cover with the screw holes on the display-assembly base.

2. Replace the four screws (M3x5) to secure the bottom cover to the display-assembly base.

Next steps

1. Install the system-board shield.

2. Install the back cover.

3. Install the cable cover (optional).

4. Install the stand.

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

Power-supply unit

Removing the power-supply unit (PSU)

Prerequisites

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

2. Remove the stand.

3. Remove the cable cover (optional).

4. Remove the back cover.

5. Remove the system-board shield.

6. Remove the bottom cover.

About this task

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

46 Removing and installing components

Removing and installing components 47

Steps

1. Remove the screw (M3x5) that secures the power-supply socket to the rear-I/O bracket.

2. Slide the power-supply socket out of the rear-I/O bracket.

3. Remove the power-supply cable from the routing guides on the rear-I/O bracket and PSU fan.

4. Disconnect the power-supply cable from the connector on the system board.

5. Remove the screw (M3x5) that secures the PSU to the display-assembly base.

6. Lift the PSU out of the system.

Installing the power-supply unit (PSU)

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 PSU and provides a visual representation of the PSU installation procedure.

48 Removing and installing components

Removing and installing components 49

Steps

1. Align and place the PSU in the slot on the display-assembly base.

2. Replace the screw (M3x5) to secure the PSU to the display-assembly base.

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

4. Route the power-supply cable through the routing guides on the rear-I/O bracket and PSU fan.

5. Align the screw hole on the power-supply socket with the screw hole on the rear-I/O bracket, and place it in the slot on the

rear-I/O bracket.

6. Replace the screw (M3x5) to secure the power-supply socket to the rear-I/O bracket.

Next steps

1. Install the bottom cover.

2. Install the system-board shield.

3. Install the back cover.

4. Install the cable cover (optional).

5. Install the stand.

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

Power-supply fan

Removing the PSU fan

Prerequisites

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

2. Remove the stand.

3. Remove the cable cover (optional).

4. Remove the back cover.

5. Remove the system-board shield.

6. Remove the bottom cover.

About this task

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

50 Removing and installing components

Steps

1. Remove the power-supply cable from the routing guides on the PSU fan.

2. Disconnect the PSU-fan cable from the system board.

3. Remove the two screws (M3x5) that secure the PSU fan to the display-assembly base.

4. Lift the PSU fan from the display-assembly base.

Installing the PSU 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 the PSU fan and provides a visual representation of the installation procedure.

Removing and installing components 51

Steps

1. Align the screw holes on the PSU fan with the screw holes on the display-assembly base.

2. Replace the two screws (M3x5) to secure the PSU fan to the display-assembly base.

3. Connect the PSU-fan cable to the connector on the system board.

4. Route the power-supply cable through the routing guides on the PSU fan.

Next steps

1. Install the bottom cover.

2. Install the system-board shield.

3. Install the back cover.

4. Install the cable cover (optional).

5. Install the stand.

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

Heat sink

Removing the heat sink—UMA

Prerequisites

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

2. Remove the stand.

3. Remove the cable cover (optional).

4. Remove the back cover.

5. Remove the system-board shield.

6. Remove the system fan.

52 Removing and installing components

About this task

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

procedure.

Steps

1. In reverse sequential order (as indicated on the heat sink), loosen the five captive screws that secure the heat sink to the

system board and the display-assembly base.

2. Slide and lift the heat sink off the system board and display-assembly base.

Installing the heat sink—UMA

Prerequisites

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

NOTE: If either the system board or the heat sink is replaced, use the thermal pad/paste provided in the kit to ensure that

thermal conductivity is achieved.

About this task

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

Removing and installing components 53

Steps

1. Align the screw holes on the heat sink with the screw holes on the system board and the display-assembly base.

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

board and display-assembly base.

Next steps

1. Install the system fan.

2. Install the system-board shield.

3. Install the back cover.

4. Install the cable cover (optional).

5. Install the stand.

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

Removing the heat sink—discrete

Prerequisites

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

2. Remove the stand.

3. Remove the cable cover (optional).

4. Remove the back cover.

5. Remove the system-board shield.

6. Remove the system fan.

54 Removing and installing components

About this task

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

procedure.

Steps

1. In reverse sequential order (as indicated on the heat sink), loosen the nine captive screws that secure the heat sink to the

system board and the display-assembly base.

2. Slide and lift the heat sink off the system board and display-assembly base.

Installing the heat sink—discrete

Prerequisites

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

NOTE: If either the system board or the heat sink is replaced, use the thermal pad/paste provided in the kit to ensure that

thermal conductivity is achieved.

About this task

The following image indicates the location of the heat sink and provides a visual representation of the heat sink installation

procedure.

Removing and installing components 55

Steps

1. Align the screw holes on the heat sink with the screw holes on the system board and the display-assembly base.

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

board and display-assembly base.

Next steps

1. Install the system fan.

2. Install the system-board shield.

3. Install the back cover.

4. Install the cable cover (optional).

5. Install the stand.

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

Processor

Removing the processor

Prerequisites

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

2. Remove the stand.

3. Remove the cable cover (optional).

4. Remove the back cover.

5. Remove the system-board shield.

56 Removing and installing components

6. Remove the heat sink.

About this task

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

Steps

1. Press the release lever down and then push it away from the processor to release it from the securing tab.

2. Extend the release lever completely, and open the processor cover.

CAUTION: When removing the processor, do not touch any of the pins inside the socket or allow any objects

to fall on the pins in the socket.

3. Gently lift the processor from the processor socket.

Installing the processor

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 processor and provides a visual representation of the installation procedure.

Removing and installing components 57

Steps

1. Ensure that the release lever on the processor socket is fully extended in the open position.

NOTE: The pin-1 corner of the processor has a triangle that aligns with the triangle on the pin-1 corner on the processor

socket. When the processor is properly seated, all four corners are aligned at the same height. If one or more corners of

the processor are higher than the others, the processor is not seated properly.

2. Align the notches on the processor with the tabs on the processor socket and place the processor in the processor socket.

CAUTION: Ensure that the processor-cover notch is positioned underneath the alignment post.

3. When the processor is fully seated in the socket, pivot the release-lever down and place it under the tab on the processor

cover.

Next steps

1. Install the heat sink.

2. Install the system-board shield.

3. Install the back cover.

4. Install the cable cover (optional).

5. Install the stand.

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

58 Removing and installing components

Rear-I/O bracket

Removing the rear-I/O bracket

Prerequisites

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

2. Remove the stand.

3. Remove the cable cover (optional).

4. Remove the back cover.

5. Remove the system-board shield.

6. Remove the bottom cover.

About this task

The following image indicates the location of the rear-I/O bracket and provides a visual representation of the removal

procedure.

Steps

1. Remove the screw (M3x5) that secures the power-supply socket to the rear-I/O bracket.

2. Remove the power-supply cable from the routing guide on the rear-I/O bracket.

3. Slide and remove the power-supply socket away from the rear-I/O bracket.

4. Remove the three screws (M3x5) that secure the rear-I/O bracket to the display-assembly base.

5. Lift the rear-I/O bracket off the display-assembly base.

Removing and installing components 59

Installing the rear-I/O bracket

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 rear-I/O bracket and provides a visual representation of the installation

procedure.

Steps

1. Align the screw holes on the rear-I/O bracket with the screw holes on the display-assembly base.

2. Replace the three screws (M3x5) to secure the rear-I/O bracket to the display-assembly base.

3. Route the power-supply cables through the routing guide on the rear-I/O bracket.

4. Align the screw hole on the power-supply socket with the screw hole on the rear-I/O bracket, and place it in the slot on the

rear-I/O bracket.

5. Replace the screw (M3x5) to secure the power-supply socket to the rear-I/O bracket.

Next steps

1. Install the bottom cover.

2. Install the system-board shield.

3. Install the back cover.

4. Install the cable cover (optional).

5. Install the stand.

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

60 Removing and installing components

System board

Removing the system board

Prerequisites

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

NOTE: Your computer’s Service Tag is stored in the system board. You must enter the Service Tag in the BIOS setup

program after you replace the system board.

NOTE: Replacing the system board removes any changes you have made to the BIOS using the BIOS setup program.

You must make the appropriate changes again after you replace the system board.

2. Remove the stand.

3. Remove the cable cover (optional).

4. Remove the back cover.

5. Remove the hard drive.

6. Remove the system-board shield.

7. Remove the memory modules.

8. Remove the wireless card.

9. Remove the M.2 2230 solid-state drive.

10. Remove the M.2 2280 solid-state drive/Intel Optane memory.

11. Remove the heat sink.

12. Remove the processor.

13. Remove the coin-cell battery.

14. Remove the bottom cover.

15. Remove the rear-I/O bracket.

About this task

The following image indicates the connectors on your system board.

Removing and installing components 61

1. Power-supply unit (PSU) cable connector

2. Coin-cell battery

3. Display back-light cable connector

4. Camera cable connector

5. M.2 2230/2280 solid-state drive/Intel Optane PCIe connector

6. Processor-fan cable connector

7. Memory modules

8. Hard-drive connector

9. M.2 2230/2280 solid-state drive PCIe connector

10. Side I/O-signal cable connector

11. Side I/O-power cable connector

12. Audio-board cable connector

13. Microphone-module cable connector

14. Speaker cable connector

15. Power-button cable connector

16. Display cable connector

17. M.2 WLAN connector

18. PSU-fan cable connector

19. Touchscreen cable connector

20. Processor

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

Steps

1. Disconnect the display back-light cable from the connector on the system board.

2. Disconnect the display cable from the connector on the system board.

3. Disconnect the PSU cable from the connector on the system board.

62 Removing and installing components

4. Disconnect the PSU fan cable from the connector on the system board.

5. Open the latch and disconnect the power-button board cable from the connector on the system board.

6. Disconnect the speaker cable from the connector on the system board.

7. Disconnect the microphone-module cable from the connector on the system board.

8. Disconnect the SIO-signal cable from the connector on the system board.

9. Disconnect the SIO-power cable from the connector on the system board.

10. Disconnect the audio-board cable from the connector on the system board.

11. Disconnect the system fan cable from the connector on the system board.

12. Disconnect the touchscreen cable from the connector on the system board.

13. Disconnect the camera cable from the connector on the system board.

14. Remove the nine screws (M3x5) that secure the system board to the display-assembly base.

15. Lift and remove the system board from the display-assembly base.

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 connectors on your system board.

1. Power-supply unit (PSU) cable connector

2. Coin-cell battery

3. Display back-light cable connector

4. Camera cable connector

5. M.2 2230/2280 solid-state drive/Intel Optane PCIe connector

6. Processor-fan cable connector

7. Memory modules

Removing and installing components 63

8. Hard-drive connector

9. M.2 2230/2280 solid-state drive PCIe connector

10. SIO-signal cable connector

11. SIO-power cable connector

12. Audio-board cable connector

13. Microphone-module cable connector

14. Speaker cable connector

15. Power-button cable connector

16. Display cable connector

17. M.2 WLAN connector

18. PSU-fan cable connector

19. Touchscreen cable connector

20. Processor

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

Steps

1. Align the screw holes on the system board with the screw holes on the display-assembly base.

2. Replace the nine screws (M3x5) to secure the system board to the display-assembly base.

3. Connect the camera cable to the connector system board.

4. Connect the touchscreen cable to the system board.

5. Connect the system fan cable to the system board.

6. Connect the audio-board cable to the system board.

7. Connect the SIO-power cable to the system board.

8. Connect the SIO-signal cable to the system board.

9. Connect the microphone-module cable to the system board.

64 Removing and installing components

10. Connect the speaker cable to the system board.

11. Connect the power-button board cable to the system board and close the latch to secure the cable.

12. Connect the PSU-fan cable to the system board.

13. Connect the PSU cable to the system board.

14. Connect the display cable to the system board.

15. Connect the display back-light cable to the system board.

NOTE: Ensure the display back-light cable is routed under the system board and not to the side of the system board to

avoid the cable getting caught between the system board and the camera. This damages the cable, and the camera may

not lock in a closed position.

Next steps

1. Install the rear-I/O bracket.

2. Install the bottom cover.

3. Install the coin-cell battery.

4. Install the processor.

5. Install the heat sink.

6. Install the M.2 2280 solid-state drive/Intel Optane memory.

7. Install the M.2 2230 solid-state drive.

8. Install the wireless card.

9. Install the memory modules.

10. Install the system-board shield.

11. Install the hard drive.

12. Install the back cover.

13. Install the cable cover (optional).

14. Install the stand.

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

NOTE: Your computer’s Service Tag is stored in the system board. You must enter the Service Tag in the BIOS setup

program after you replace the system board.

NOTE: Replacing the system board removes any changes you have made to the BIOS using the BIOS setup program.

You must make the appropriate changes again after you replace the system board.

Speakers

Removing the speakers

Prerequisites

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

2. Remove the stand.

3. Remove the cable cover (optional).

4. Remove the back cover.

5. Remove the system-board shield.

6. Remove the bottom cover.

7. Remove the rear-I/O bracket.

About this task

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

Removing and installing components 65

Steps

1. Disconnect the speaker cable from the connector on the system board.

2. Remove the six screws (M3 4+7.1xZN) that secure the speakers to the display-assembly base.

3. Remove the speaker cable from the routing guides on the display-assembly base.

4. Lift the speakers along with the cable off the display-assembly base.

Installing the speakers

Prerequisites

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

About this task

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

66 Removing and installing components

Steps

1. Align the screw holes on the speakers with the screw holes on the display-assembly base.

2. Replace the six screws (M3 4+7.1xZN) to secure the speakers to the display-assembly base.

3. Route the speaker cable through the routing guide on display-assembly base and connect the speaker cable to the system

board.

Next steps

1. Install the rear-I/O bracket.

2. Install the bottom cover.

3. Install the system-board shield.

4. Install the back cover.

5. Install the cable cover (optional).

6. Install the stand.

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

Removing and installing components 67

Power-button board

Removing the power-button board

Prerequisites

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

2. Remove the stand.

3. Remove the cable cover (optional).

4. Remove the back cover.

5. Remove the system-board shield.

6. Remove the bottom cover.

7. Remove the rear-I/O bracket.

8. Remove the speakers.

About this task

The following image indicates the location of the power-button board and provides a visual representation of the power-button

board removal procedure.

Steps

1. Open the latch and disconnect the power-button board cable from the connector on the system board.

2. Remove the screw (M3x5) that secures the power-button board to the middle frame.

3. Lift the power-button board away from the middle frame.

68 Removing and installing components

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 the power-button board and provides a visual representation of the power-button

board installation procedure.

Steps

1. Align and place the power-button board in the slot on the middle frame.

2. Replace the screw (M3x5) to secure the power-button board to the middle frame.

3. Slide the power-button board cable into the connector on the system board and close the latch to secure the cable.

Next steps

1. Install the speakers.

2. Install the rear-I/O bracket.

3. Install the bottom cover.

4. Install the system-board shield.

5. Install the back cover.

6. Install the cable cover (optional).

7. Install the stand.

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

Removing and installing components 69

Microphones

Removing the microphones

Prerequisites

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

2. Remove the stand.

3. Remove the cable cover (optional).

4. Remove the back cover.

5. Remove the system-board shield.

6. Remove the bottom cover.

7. Remove the rear-I/O bracket.

8. Remove the speakers.

About this task

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

Steps

1. Disconnect the microphone cable from the system board, and unroute it from the routing guides on the display-assembly

base.

2. Remove the two screws (M2x2.5) that secure the microphone modules to the middle frame.

3. Lift the microphone modules off the slots on the middle frame.

70 Removing and installing components

Installing the microphones

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 microphones and provides a visual representation of the installation procedure.

Steps

1. Align the screw holes on the microphone modules with the screw holes on the middle frame.

2. Replace the two screws (M2X2.5) to secure the microphone modules to the middle frame.

3. Route the microphone cable through the routing guides on the display-assembly base and connect the microphone cable to

the system board.

Next steps

1. Install the speakers.

2. Install the rear-I/O bracket.

3. Install the bottom cover.

4. Install the system-board shield.

5. Install the back cover.

6. Install the cable cover (optional).

7. Install the stand.

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

Removing and installing components 71

Side I/O-board

Removing the side I/O-board

Prerequisites

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

2. Remove the stand.

3. Remove the cable cover (optional).

4. Remove the back cover.

5. Remove the hard drive.

6. Remove the system-board shield.

7. Remove the bottom cover.

8. Remove the rear-I/O bracket.

About this task

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

72 Removing and installing components

Steps

1. Remove the two screws (M3x5) that secure the side I/O-board shield to the display-assembly base.

2. Lift and remove the side I/O-board shield off the side I/O-board.

3. Disconnect the SIO-signal cable, SIO-power cable, and audio-board cable from the system board.

4. Remove the SIO-signal cable, SIO-power cable, and audio-board cable from the routing guides on the display-assembly base.

5. Remove the two screws (M2.5x3.5) that secure the side I/O-board to the display-assembly base.

6. Lift and remove the side I/O-board with cables off the display-assembly base.

Installing the side 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 the side I/O-board and provides a visual representation of the installation

procedure.

Removing and installing components 73

Steps

1. Align the screw holes on the side I/O-board with the screw holes on the display-assembly base.

2. Replace the two screws (M2.5x3.5) to secure the side I/O-board to the display-assembly base.

3. Route the SIO-signal cable, SIO-power cable, and audio-board cable through the routing guides on the display-assembly

base.

4. Connect the SIO-signal cable, SIO-power cable, and audio-board cable to the connectors on the system board.

5. Align the screw holes on the side I/O-board shield with the screw holes on the display-assembly base.

6. Replace the two screws (M3x5) to secure the side I/O-board shield to the display-assembly base.

Next steps

1. Install the speakers.

2. Install the rear-I/O bracket.

3. Install the bottom cover.

4. Install the system-board shield.

5. Install the hard drive.

6. Install the back cover.

7. Install the cable cover (optional).

8. Install the stand.

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

Audio board

Removing the audio board

Prerequisites

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

2. Remove the stand.

3. Remove the cable cover (optional).

4. Remove the back cover.

5. Remove the system-board shield.

6. Remove the wireless card.

7. Remove the bottom cover.

8. Remove the rear-I/O bracket.

9. Remove the speakers.

10. Remove the side-I/O board.

About this task

The following image indicates the location of the audio board and provides a visual representation of the installation procedure.

74 Removing and installing components

Steps

1. Disconnect the audio-board cable from the connector on the system board.

2. Remove the screw (M3x5) that secure the audio board to the display-assembly base.

3. Lift and remove the audio board with the cable off the display-assembly base.

Installing the audio 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 the audio board and provides a visual representation of the removal procedure.

Steps

1. Align the screw hole on the audio board with the screw hole on the display-assembly base.

2. Replace the screw (M3x5) to secure the audio board to the display-assembly base.

Removing and installing components 75

3. Connect the audio-board cable to the system board.

Next steps

1. Install the side-I/O board.

2. Install the speakers.

3. Install the rear-I/O bracket.

4. Install the bottom cover.

5. Install the wireless card.

6. Install the system-board shield.

7. Install the back cover.

8. Install the cable cover (optional).

9. Install the stand.

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

Antenna modules

Removing the antenna modules

Prerequisites

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

2. Remove the stand.

3. Remove the cable cover (optional).

4. Remove the back cover.

5. Remove the system-board shield.

6. Remove the wireless card.

7. Remove the bottom cover.

8. Remove the rear-I/O bracket.

9. Remove the speakers.

About this task

The following image indicates the location of the antenna modules and provides a visual representation removal procedure of the

antenna modules.

76 Removing and installing components

Steps

1. Remove the antenna cables from the routing guides on the display-assembly base.

2. Remove the two screws (M2x2.5) that secure the antenna modules to the middle frame.

3. Carefully peel the copper foil that secures the antenna cables to the middle frame.

4. Lift the antenna modules off the middle frame.

Removing and installing components 77

Installing the antenna modules

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 antenna modules and provides a visual representation of the antenna modules

installation procedure.

78 Removing and installing components

Steps

1. Align and place the antenna modules in the slots on the middle frame.

2. Adhere the copper foil that secures the antenna cables to the middle frame.

3. Replace the two screws (M2x2.5) to secure the antenna modules to the middle frame.

4. Route the antenna cables through the routing guides on the display-assembly base.

Next steps

1. Install the speakers.

2. Install the rear-I/O bracket.

3. Install the bottom cover.

4. Install the wireless card.

5. Install the system-board shield.

6. Install the back cover.

7. Install the cable cover (optional).

8. Install the stand.

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

Display panel

Removing the display panel

Prerequisites

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

2. Remove the stand.

3. Remove the cable cover (optional).

4. Remove the back cover.

5. Remove the system-board shield.

6. Remove the hard drive.

7. Remove the bottom cover.

8. Remove the rear-I/O bracket.

9. Remove the speakers.

10. Remove the camera assembly.

Removing and installing components 79

11. Remove the system board.

12. Remove the PSU.

13. Remove the PSU fan.

About this task

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

procedure.

80 Removing and installing components

Steps

1. Remove the 12 screws (M3x5) that secure the display panel to the middle frame and display-assembly base.

2. Unroute the display back-light cable from the routing guides on the display-assembly base.

3. Place the system in an upright position.

4. Holding the top corner, release the display panel away from the middle frame and display-assembly base.

5. Route the display back-light and display cable through the slots on the display-assembly base.

6. Lift the display panel up from the middle frame and display-assembly base.

Installing the display panel

Prerequisites

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

About this task

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

installation procedure.

Removing and installing components 81

Steps

1. Place the system in an upright position, and slide the display panel on the slots of the display-assembly base.

2. Route the display-backlight, and display cable through the slots on the display-assembly base.

3. Place the display-assembly base on a clean and flat surface with the display panel facing down.

82 Removing and installing components

4. Replace the nine screws (M3x5) to secure the display panel to the middle frame and display-assembly base.

5. Remove the three jig screws from the display panel and replace with three screws (M3x5) to secure the display panel to the

middle frame and display assembly base.

NOTE: The jig screw is shipped with the replacement display panel. It is used to align the display panel to the display-

assembly base.

Table 3. Number of jig screws

Display type Number of jig screws

Touch display One

Non-touch

display

Three

Removing and installing components 83

6. Route the display back-light cable in the routing guides on the display-assembly base.

Next steps

1. Install the PSU fan.

2. Install the PSU.

3. Install the system board.

4. Install the camera assembly.

5. Install the speakers.

6. Install the rear-I/O bracket.

7. Install the bottom cover.

8. Install the hard drive.

9. Install the system-board shield.

10. Install the back cover.

11. Install the cable cover (optional).

12. Install the stand.

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

Middle frame

Removing the middle frame

Prerequisites

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

2. Remove the stand.

3. Remove the cable cover (optional).

4. Remove the back cover.

5. Remove the system-board shield.

6. Remove the hard drive.

7. Remove the wireless card.

8. Remove the bottom cover.

9. Remove the rear-I/O bracket.

10. Remove the speakers.

11. Remove the camera assembly.

12. Remove the system board.

13. Remove the power-button board.

14. Remove the microphones.

15. Remove the PSU.

16. Remove the PSU fan.

17. Remove the side-I/O board.

18. Remove the antenna modules.

19. Remove the display panel.

About this task

The following image indicates the location of the middle frame and provides a visual representation of the middle frame removal

procedure.

84 Removing and installing components

Steps

1. Remove the 17 screws (M3x5) that secure the middle frame to the display-assembly base.

2. Remove the middle frame and lift the middle frame off the display-assembly base.

Removing and installing components 85

Installing the middle frame

Prerequisites

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

About this task

The following image indicates the location of the middle frame and provides a visual representation of the middle frame

installation procedure.

86 Removing and installing components

Steps

1. Slide and align the middle frame to the slots on the display-assembly base, then snap the middle frame into place on the

display-assembly base.

2. Replace the 17 screws (M3x5) to secure the middle frame to the display-assembly base.

Next steps

1. Install the display panel.

2. Install the antenna modules.

3. Install the side-I/O board.

4. Install the PSU fan.

5. Install the PSU.

6. Install the microphones.

7. Install the power-button board.

8. Install the system board.

9. Install the camera assembly.

10. Install the speakers.

11. Install the rear-I/O bracket.

12. Install the bottom cover.

13. Install the wireless card.

14. Install the hard drive.

15. Install the system-board shield.

16. Install the back cover.

17. Install the cable cover (optional).

18. Install the stand.

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

Removing and installing components 87

Drivers and downloads

When troubleshooting, downloading or installing drivers it is recommended that you read the Dell Knowledge Based article,

Drivers and Downloads FAQ SLN128938.

88 Drivers and downloads

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.

BIOS overview

The BIOS manages data flow between the computer's operating system and attached devices such as hard disk, video adapter,

keyboard, mouse, and printer.

Entering BIOS setup program

About this task

Turn on (or restart) your computer and press F2 immediately.

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:

UEFI only

●Windows Boot Manager

●UEFI HTTPs Boot

●Onboard NIC (IPV4)

●Onboard NIC (IPV6)

●UEFI Hard Drive

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.

System setup 89

Keys Navigation

Down arrow Moves to the next field.

Enter Selects a value in the selected field (if applicable) or follow the link in the field.

Spacebar Expands or collapses a drop-down list, if applicable.

Tab Moves to the next focus area.

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.

System setup options

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

Table 4. System setup options—System information menu

Overview

OptiPlex 7490 All-in-One

BIOS Version Displays the BIOS version number.

Service Tag Displays the Service Tag of the computer.

Asset Tag Displays the Asset Tag of the computer.

Manufacture Date Displays the manufacture date of the computer.

Ownership Date Displays the ownership date of the computer.

Express Service Code Displays the express service code of the computer.

Ownership Tag Displays the Ownership Tag of the computer.

Signed Firmware Update Displays whether the Signed Firmware Update is enabled on your computer.

Processor Information

Processor Type Displays the processor type.

Maximum Clock Speed Displays the maximum processor clock speed.

Minimum Clock Speed Displays the minimum processor clock speed.

Current Clock Speed Displays the current processor clock speed.

Core Count Displays the number of cores on the processor.

Processor ID Displays the processor identification code.

Processor L2 Cache Displays the processor L2 Cache size.

Processor L3 Cache Displays the processor L3 Cache size.

Microcode Version Displays the microcode version.

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

64-Bit Technology Displays whether 64-bit technology is used.

Memory Information

Memory Installed Displays the total computer memory installed.

Memory Available Displays the total computer memory available.

Memory Speed Displays the memory speed.

Memory Channel Mode Displays single or dual channel mode.

Memory Technology Displays the technology used for the memory.

DIMM_SLOT 1 Displays the DIMM 1 memory size.

90 System setup

Table 4. System setup options—System information menu (continued)

Overview

DIMM_SLOT 2 Displays the DIMM 2 memory size.

Devices Information

Panel Type Displays the Panel Type of the computer.

Video Controller Displays the video controller type of the computer.

Video Memory Displays the video memory information of the computer.

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

Native Resolution Displays the native resolution of the computer.

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

Audio Controller Displays the audio controller information of the computer.

Bluetooth Device Displays the Bluetooth device information of the computer.

LOM MAC Address Displays the LAN On Motherboard (LOM) MAC address of the computer.

Slot 1 Displays the M.2 network information of the computer

SATA 0 Displays the SATA hard drive information of the computer.

Slot 2_M.2 Displays the M.2 PCIe SSD information of the computer.

Slot 3_M.2 Displays the M.2 PCIe SSD information of the computer.

Table 5. System setup options—Boot Configuration menu

Boot Configuration

Boot Sequence

Boot mode Displays the boot mode.

Boot Sequence Displays the boot sequence.

Secure Digital (SD) Card Boot Enable or disable the SD card read-only boot.

By default, the Secure Digital (SD) Card Boot option is not enabled.

Secure Boot

Enable Secure Boot Enable or disable the secure boot feature.

By default, the option is not enabled.

Secure Boot Mode Enable or disable to change the secure boot mode options.

By default, the Deployed Mode is enabled.

Expert Key Management

Enable Custom Mode Enable or disable custom mode.

By default, the custom mode option is not enabled.

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

Table 6. System setup options—Integrated Devices menu

Integrated Devices

Date/Time Displays the current date in MM/DD/YYYY format and current time in

HH:MM:SS AM/PM format.

Camera Enables or disable the camera.

By default, the Enable Camera option is selected

Audio

System setup 91

Table 6. System setup options—Integrated Devices menu (continued)

Integrated Devices

Enable Audio Enable or disable the integrated audio controller.

By default, all the options are enabled.

USB Configuration ●Enable or disable booting from USB mass storage devices through the boot

sequence or boot menu.

By default, all the options are enabled.

Side USB Configuration Enable or disable the individual side USB ports.

By default, the Side USB Port 1 (Bottom) and Side USB Port 2

(Top)option are enabled.

Rear USB Configuration Enable or disable the individual rear USB ports.

By default, all the options are enabled.

Table 7. System setup options—Storage menu

Storage

SATA Operation Enable or disable the operating mode of the integrated SATA hard drive

controller.

By default, the RAID On option is enabled.

Storage Interface

Port Enablement Enable or disable the onboard drives.

By default, SATA HDD, M.2 PCIe SSD-0, and M.2 PCIe SSD-1 options are

enabled.

SMART Reporting

Enable SMART Reporting Enable or disable Self-Monitoring, Analysis, and Reporting Technology

(SMART) during computer startup.

By default, the Enable SMART Reporting option is not enabled.

Drive Information

SATA HDD

Type Displays the SATA HDD type information of the computer.

Device Displays the SATA HDD device information of the computer.

M.2 PCIe SSD-0

Type Displays the M.2 PCIe SSD-0 type information of the computer.

Device Displays the M.2 PCIe SSD-0 device information of the computer.

M.2 PCIe SSD-1

Type Displays the M.2 PCIe SSD-1 type information of the computer.

Device Displays the M.2 PCIe SSD-1 device information of the computer.

Enable MediaCard

Secure Digital (SD) Card Enable or disable the SD card.

By default, the Secure Digital (SD) Card option is enabled.

Secure Digital (SD) Card Read-Only Mode Enable or disable the SD card read-only mode.

By default, the Secure Digital (SD) Card Read-Only Mode option is not

enabled.

92 System setup

Table 8. System setup options—Display menu

Display

OSD Button Management

Disable OSD Buttons Enable or disable the OSD (On-Screen Display) buttons on the computer.

Full Screen Logo Enable or disable full screen logo.

By default, the option is not enabled.

Table 9. System setup options—Connection menu

Connection

Network Controller Configuration

Integrated NIC Controls the on-board LAN controller.

By default, the Enabled with PXE option is enabled.

Wireless Device Enable

WLAN Enable or disable the internal WLAN device

By default, the option enabled.

Bluetooth Enable or disable the internal Bluetooth device

By default, the option enabled.

Enable UEFI Network Stack Enable or disable UEFI Network Stack and controls the on-board LAN

Controller.

By default, the option is enabled.

HTTPs Boot Feature

HTTPs Boot Enable or disable the HTTPs Boot feature.

By default, the HTTPs Boot option is enabled.

HTTPs Boot Mode With Auto Mode, the HTTPs Boot extracts Boot URL from the DHCP. With

Manual Mode, the HTTPs Boot reads Boot URL from the user-provided data.

By default, the Auto Mode option is enabled.

Table 10. System setup options—Power menu

Power

USB PowerShare

Enable USB PowerShare Enable or disable the USB PowerShare.

By default, the Enable USB PowerShare option is disabled

USB Wake Support

Enable USB Wake Support When enabled, you can use the USB devices like a mouse or keyboard to wake

your computer from standby.

By default, the option is enabled.

AC Behavior

AC Recovery Enables the system to turn on automatically, when AC is inserted.

By default, the Power Off option is enabled.

Block Sleep Enables to block entering sleep (S3) mode in the operating system.

By default, the Block Sleep option is disabled.

Deep Sleep Control Enable or disable the Deep Sleep mode support.

System setup 93

Table 10. System setup options—Power menu (continued)

Power

By default, the Enabled in S4 and S5 option is enabled.

Fan Control Override Enable or disable the fan control override feature.

By default, the option is disabled.

Intel Speed Shift Technology Enable or disable the Intel speed shift technology support.

By default, the Intel Speed Shift Technology option is enabled.

Table 11. System setup options—Security menu

Security

TPM 2.0 Security

TPM 2.0 Security On Enable or disable TPM 2.0 security options.

By default, the TPM 2.0 Security On option is enabled.

Attestation Enable Enables to control whether the Trusted Platform Module (TPM) Endorsement

Hierarchy is available to the operating system.

By default, the Attestation Enable option is enabled.

Key Storage Enable Enables to control whether the Trusted Platform Module (TPM) Storage

Hierarchy is available to the operating system.

By default, the Key Storage Enable option is enabled.

SHA-256 BIOS and the TPM will use the SHA-256 hash algorithm to extend

measurements into the TPM PCRs during BIOS boot.

By default, the SHA-256 option is enabled.

Clear Enables to clear the TPM owner information and returns the TPM to the

default state.

By default, the Clear option is disabled.

PPI ByPass for Clear Commands Controls the TPM Physical Presence Interface (PPI).

By default, the PPI ByPass for clear Commands option is disabled.

Chassis intrusion Controls the chassis intrusion feature.

By default, the option is disabled.

SMM Security Mitigation Enable or disable SMM Security Mitigation.

By default, the option is enabled.

Data Wipe on Next Boot

Start Data Wipe Enable or disable the data wipe on next boot.

By default, the option is disabled.

Absolute Enable or disable or permanently disable the BIOS module interface of the

optional Absolute Persistence Module service from Absolute software.

By default, the option is enabled.

UEFI Boot Path Security Controls whether or not the computer will prompt the user to enter the admin

password (if set) when booting to a UEFI boot device from the F12 boot menu.

By default, the Always Except Internal HDD option is enabled.

94 System setup

Table 12. System setup options—Passwords menu

Passwords

Admin Password Set, change, or delete the administrator password.

System Password Set, change, or delete the computer password.

NVMe SSD0 Set, change, or delete the NVMe SSD0 password.

Password Configuration

Upper Case Letter Reinforces password must have at least one upper case letter.

By default, the option is disabled.

Lower Case Letter Reinforces password must have at least one lower case letter.

By default, the option is disabled.

Digit Reinforces password must have at least one digit.

By default, the option is disabled.

Special Character Reinforces password must have at least one special character.

By default, the option is disabled.

Minimum Characters Set the minimum characters allowed for password.

Password Bypass When enabled, this always prompts for computer and internal hard drive

passwords when powered on from the off state.

By default, the Disabled option is enabled.

Password Changes

Enable Non-Admin Password Changes Enable or disable to change computer and hard drive password without the

need for admin password.

By default, the option is enabled.

Admin Setup Lockout

Enable Admin Setup Lockout Enables administrators control over how their users can or cannot access BIOS

setup.

By default, the option is disabled.

Master Password Lockout

Enable Master Password Lockout When enabled, this will disable the master password support.

By default, the option is disabled.

Allow Non-Admin PSID Revert

Enable Allow Non-Admin PSID Revert Controls access to the Physical Security ID (PSID) revert of NVMe hard-drives

from the Dell Security Manager prompt.

By default, the option is disabled.

Table 13. System setup options—Update, Recovery menu

Update, Recovery

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

By default, the option is enabled.

BIOS Recovery from Hard Drive Enables the user to recover from certain corrupted BIOS conditions from a

recovery file on the user primary hard drive or an external USB key.

By default, the option is enabled.

BIOS Downgrade

System setup 95

Table 13. System setup options—Update, Recovery menu (continued)

Update, Recovery

Allow BIOS Downgrade Enable or disable the flashing of the computer firmware to previous revision is

blocked.

By default, the option is enabled.

SupportAssist OS Recovery Enable or disable the boot flow for SupportAssist OS Recovery tool in the

event of certain computer errors.

By default, the option is enabled.

BIOSConnect Enable or disable cloud Service OS recovery if the main operating system fails

to boot with the number of failures equal to or greater than the value specified

by the Auto OS Recovery Threshold setup option and local Service OS does not

boot or is not installed.

By default, the option is enabled.

Dell Auto OS Recovery Threshold Controls the automatic boot flow for SupportAssist System Resolution Console

and for Dell OS Recovery Tool.

By default, the threshold value is set to 2.

Table 14. System setup options—System Management menu

System Management

Service Tag Display the Service Tag of the computer.

Asset Tag Create a computer Asset Tag.

Wake on LAN/WLAN Enable or disable the computer to power on by special LAN signals when it

receives a wakeup signal from the WLAN.

By default, the Disabled option is selected.

Auto on Time Enable to set the computer to turn on automatically every day or on a

preselected date and time. This option can be configured only if the Auto On

Time is set to Everyday, Weekdays, or Selected Days.

By default, the option is disabled.

Intel AMT Capability

Enable Intel AMT Capability Enable or disable the Intel AMT capabilty.

By default, the Restrict MEBx Access option is enabled.

MEBx Hotkey Enable or disable MEBx hotkey.

By default, the option is disabled.

USB Provision

Enable USB Provision Enable or disable the Intel AMT provisioning using the local provisioning file

through a USB storage device.

By default, the option is disabled.

SERR Messages Enable or disable SERR messages.

By default, the option is enabled.

Keyboard Errors

Enable Keyboard Error Detection

Numlock LED

Enable Numlock LED Enable or disable Numlock LED.

By default, the option is enabled.

96 System setup

Table 15. System setup options—Keyboard menu

Keyboard

Keyboard Errors

Enable Keyboard Error Detection Enable or disable the keyboard error detection.

By default, the option is enabled.

Numlock LED

Enable Numlock LED Enable or disable Numlock LED.

By default, the option is enabled.

Table 16. System setup options—Pre-boot Behavior menu

Pre-boot Behavior

Warning and Errors Enable or disable the action to be done when a warning or error is encountered.

By default, the Prompt on Warnings and Errors option is enabled.

Fastboot Enable to set the speed of the boot process.

By default, the Thorough option is enabled.

Extend BIOS POST Time Set the BIOS POST time.

By default, the 0 seconds option is enabled.

Table 17. System setup options—Virtualization menu

Virtualization

Intel Virtualization Technology

Enable Intel Virtualization Technology

(VT)

Specify whether a Virtual Machine Monitor (VMM) can utilize the additional

hardware capabilities provided by Intel Virtualization Technology.

By default, the option is enabled.

VT for Direct I/O Specify whether a Virtual Machine Monitor (VMM) can utilize the additional

hardware capabilities provided by Intel Virtualization Technology for Direct I/O.

By default, the option is enabled.

Intel Trusted Execution Technology

(TXT)

Enable Intel Trusted Execution

Technology (TXT)

Specifies whether a measured Virtual Machine Monitor (MVMM) can utilize

the additional hardware capabilities provided by Intel Trusted Execution

Technology.

By default, the option is disabled.

Table 18. System setup options—Performance menu

Performance

Multi Core Support

Active Cores Enables to change the number of CPU cores available to the operating system.

By default, the All Cores options is enabled.

Intel SpeedStep

Enable Intel SpeedStep Technology Enables the computer to dynamically adjust processor voltage and core

frequency, decreasing average power consumption and heat production.

By default, the option is enabled.

C-States Control

System setup 97

Table 18. System setup options—Performance menu (continued)

Performance

Enable C-State Control Enable or disable additional processor sleep states.

By default, the option is enabled.

Intel Turbo Boost Technology

Enable Intel Turbo Boost Technology Enable or disable Intel TurboBoost mode of the processor.

By default, the option is enabled.

Intel Hyper-Threading Technology

Enable Intel Hyper-Threading Technology Enable or disable Hyper-Threading in the processor.

By default, the option is enabled.

Table 19. System setup options—System Logs menu

System Logs

BIOS Event Log

Clear BIOS Event Log Display BIOS events.

By default, the Keep option is enabled.

Updating the BIOS in Windows

Prerequisites

It is recommended to update your BIOS (System Setup), when you replace the system board or if an update is available.

About this task

NOTE: If BitLocker is enabled, it must be suspended before updating the system BIOS, and then re-enabled after the BIOS

update is completed.

Steps

1. Restart the computer.

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

●Enter the Service Tag or Express Service Code and click Search.

●Click Drivers & Downloads.

●Click Detect Drivers and follow the on-screen instructions.

3. If you are unable to detect or find the Service Tag, click Browse all products.

4. Choose the appropriate category to reach the product page.

5. Select your computer model, followed by its model number.

NOTE: The Product Support page of your computer appears.

6. Click Drivers & Downloads.

NOTE: The Drivers & Downloads section is displayed.

7. Click Category, and select BIOS from the drop-down list.

8. Click the toggle button Show downloads for only THIS PC XXXXXXX.

NOTE: XXXXXXX denotes the Service Tag.

9. Select the latest BIOS file and click Download.

10. After the download is complete, browse to the folder where you saved the system BIOS executable file.

11. Double-click the system BIOS executable file.

98 System setup

NOTE: Follow the on-screen instructions.

Updating BIOS on systems with BitLocker enabled

CAUTION: If BitLocker is not suspended before updating the BIOS, the next time you reboot the system it

will not recognize the BitLocker key. You will then be prompted to enter the recovery key to progress and the

system will ask for this on each reboot. If the recovery key is not known this can result in data loss or an

unnecessary operating system re-install. For more information on this subject, see Knowledge Article: https://

www.dell.com/support/article/sln153694

Updating your system BIOS using a USB flash drive

About this task

If the computer cannot load into Windows but there is still a need to update the BIOS, download the BIOS file using another

computer and save it to a bootable USB flash drive.

NOTE: You must use a bootable USB flash drive. For more information, see the knowledge base article SLN143196.

Steps

1. Download the BIOS update .exe file to another computer.

2. Copy the .exe file onto the bootable USB flash drive.

3. Insert the USB flash drive into the computer that requires the BIOS update.

4. Restart the computer and press F12 when the Dell logo appears to display the One Time Boot Menu.

5. Using arrow keys, select USB Storage Device and press Enter.

6. The computer restarts to a Diag C:\> prompt.

7. Run the file by typing the complete filename and press Enter.

8. The BIOS Update Utility is displayed. Follow the on-screen instructions.

Figure 1. DOS BIOS Update Screen

System setup 99

Updating the Dell BIOS in Linux and Ubuntu

environments

If you want to update the system BIOS in a Linux environment such as Ubuntu, see https://www.dell.com/support/article/

sln171755/.

System and setup password

Table 20. System and setup password

Password type Description

System password Password that you must enter to log in to your system.

Setup password Password that you must enter to access and make changes to

the BIOS settings of your computer.

You can create a system password and a setup password to secure your computer.

CAUTION: The password features provide a basic level of security for the data on your computer.

CAUTION: Anyone can access the data that is stored on your computer if it is not locked and left unattended.

NOTE: System and setup password feature is disabled.

Assigning a system setup password

Prerequisites

You can assign a new System or Admin Password only when the status is in Not Set.

About this task

To enter the system setup, press F12 immediately after a power-on or reboot.

Steps

1. In the System BIOS or System Setup screen, select Security and press Enter.

The Security screen is displayed.

2. Select System/Admin Password and create a password in the Enter the new password field.

Use the following guidelines to assign the system password:

●A password can have up to 32 characters.

●The password can contain the numbers 0 through 9.

●Only lower case letters are valid, upper case letters are not valid.

●Only the following special characters are valid: Space, (”), (+), (,), (-), (.), (/), (;), ([), (\), (]), (`).

3. Type the system password that you entered earlier in the Confirm new password field and click OK.

4. Press Esc and a message prompt's you to save the changes.

5. Press Y to save the changes.

The computer restarts.

100 System setup

Deleting or changing an existing system setup password

Prerequisites

Ensure that the Password Status is Unlocked (in the System Setup) before attempting to delete or change the existing

System and/or Setup password. You cannot delete or change an existing System or Setup password, if the Password Status is

Locked.

About this task

To enter the System Setup, press F12 immediately after a power-on or reboot.

Steps

1. In the System BIOS or System Setup screen, select System Security and press Enter.

The System Security screen is displayed.

2. In the System Security screen, verify that Password Status is Unlocked.

3. Select System Password, update, or delete the existing system password, and press Enter or Tab.

4. Select Setup Password, update, or delete the existing setup password, and press Enter or Tab.

NOTE: If you change the System and/or Setup password, reenter the new password when prompted. If you delete the

System and/or Setup password, confirm the deletion when prompted.

5. Press Esc and a message prompts you to save the changes.

6. Press Y to save the changes and exit from System Setup.

The computer restarts.

Clearing CMOS settings

About this task

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

Steps

1. Turn off your computer.

2. Press and hold the power button for 30 seconds to reset the coin-cell battery.

3. Turn on your computer.

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 101

Troubleshooting

Display built-in self test

About this task

The following procedure provides the instructions on how to run the built-in self test for the display:

Steps

1. Turn off your computer.

2. Press and hold the display built-in self test button.

3. Press and hold the power button.

4. Release the power button.

5. Hold the display built-in self test button until the test starts.

SupportAssist diagnostics

About this task

The SupportAssist diagnostics (previously known as ePSA diagnostics) performs a complete check of your hardware. The

SupportAssist diagnostics is embedded in the BIOS and is launched by it internally. The SupportAssist diagnostics provides a set

of options for particular devices or device groups. It allows 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 and provide extra information about the failed device(s)

●View status messages that indicate if the tests are completed successfully

●View error messages that indicate if problems were encountered during the test

NOTE: Some tests are meant for specific devices and require user interaction. Ensure that you are present in front of the

computer when the diagnostic tests are performed.

For more information, see SupportAssist Pre-Boot System Performance Check.

Running the SupportAssist Pre-Boot System Performance Check

Steps

1. Turn on your computer.

2. As the computer boots, press the F12 key as the Dell logo appears.

3. On the boot menu screen, select the Diagnostics option.

4. Click the arrow at the bottom left corner.

Diagnostics front page is displayed.

5. Click the arrow in the lower-right corner to go to the page listing.

The items detected are listed.

6. To run a diagnostic test on a specific device, press Esc and click Yes to stop the diagnostic test.

7. Select the device from the left pane and click Run Tests.

8. If there are any issues, error codes are displayed.

Note the error code and validation number and contact Dell.

102 Troubleshooting

Diagnostics

Power status indicator light: Indicates the power status.

Solid amber—The system is unable to boot to the operating system. This indicates that the power supply or another device in

the system is failing.

Blinking white—The system is unable to boot to the operating system. This indicates that the power supply is normal but

another device in the system is failing or not installed properly.

NOTE: See the light patterns to determine if the device that is failing.

Off—System is in hibernation or turned off.

The power status indicator blinks amber along with beep codes indicating failures.

For example, the power status indicator 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 system is turned off indicating the Recovery image is not found.

The following table shows different light patterns and what they indicate:

Table 21. Diagnostic LED behavior

Blinking pattern Problem description Suggested resolution

Amber White

1 1 MBIST: TPM Detection Failure Replace the system board.

1 2 MBIST:SPI flash, Unrecoverable SPI flash

failure

Replace the system board.

1 5 i-Fuse: Failure EC unable to program i-Fuse Replace the system board.

1 6 EC internal: Failure Generic catch-all for

ungraceful EC code flow errors

Disconnect all power source (AC,

battery, coin-cell) and press and hold

the power button to drain flea power.

2 1 Processor failure Run the Intel CPU diagnostics tools. If

problem continues, replace the system

board.

2 2 System board: BIOS or ROM (Read-Only

Memory) failure

Flash the latest BIOS version. If problem

continues, replace the system board.

2 3 No memory or RAM (Random-Access

Memory) detected

Check and confirm that the memory

module is installed properly. If problem

continues, replace the memory module.

2 4 Memory or RAM (Random-Access Memory)

failure

Reset the memory module. If problem

continues, replace the memory module.

2 5 Invalid memory installed Reset the memory module. If problem

continues, replace the memory module.

2 6 System-board or chipset error Flash the latest BIOS version. If problem

continues, replace the system board.

2 7 Display failure Flash the latest BIOS version. If problem

continues, replace the LCD module.

2 8 LCD power rail failure Replace the system board.

3 1 CMOS battery failure Reset the CMOS battery connection.

If problem continues, replace the RTS

battery.

3 2 PCI, video card/chip failure Replace the system board.

3 3 Recovery image not found Flash the latest BIOS version. If problem

continues, replace the system board.

Troubleshooting 103

Table 21. Diagnostic LED behavior (continued)

Blinking pattern Problem description Suggested resolution

Amber White

3 4 Recovery image found but invalid Flash the latest BIOS version. If problem

continues, replace the system board.

3 5 Power-rail failure EC ran into power sequencing failure. If

problem continues, replace the system

board.

3 6 System BIOS Flash incomplete Flash corruption detected by BIOS. If

problem continues, replace the system

board.

3 7 Management Engine (ME) error Timeout error displayed while waiting on

ME to reply to HECI message. If problem

continues, replace the system board.

4 1 Memory DIMM power rail failure Replace the system board.

4 2 CPU power cable connection issue Initiate PSU BIST. If problem persists,

replace the system board.

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.

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 000145519 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:

104 Troubleshooting

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 Search.

NOTE: If you do not have the Service Tag, use the product ID or manually browse for your computer model.

4. Click Drivers & downloads > Find drivers.

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.

WiFi power cycle

About this task

If your computer is unable to access the internet due to WiFi connectivity issues a WiFi power cycle procedure may be

performed. The following procedure provides the instructions on how to conduct a WiFi power cycle:

NOTE: Some ISPs (Internet Service Providers) provide a modem/router combo device.

Steps

1. Turn off your computer.

2. Turn off the modem.

3. Turn off the wireless router.

4. Wait for 30 seconds.

5. Turn on the wireless router.

6. Turn on the modem.

7. Turn on your computer.

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. Disconnect the power adapter from your computer.

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

4. Connect the power adapter to your computer.

5. Turn on your computer.

Troubleshooting 105

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 22. Self-help resources

Self-help resources Resource location

Information about Dell products and services www.dell.com

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 https://www.dell.com/support/home/?

app=knowledgebase.

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

3. Click Search to retrieve the related articles.

Contacting Dell

To contact Dell for sales, technical support, or customer service issues, see www.dell.com/contactdell.

NOTE: Availability varies by country and product, and some services may not be available in your country.

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.

106 Getting help and contacting Dell

Table of Contents

DELL 7490 User Manual

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