Dell OptiPlex 7090 Ultra User manual

OptiPlex 7090 Ultra
Service Manual
Regulatory Model: D13U
Regulatory Type: D13U002
August 2021
Rev. A01

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.
© 2021 Dell Inc. or its subsidiaries. All rights reserved. Dell, EMC, and other trademarks are trademarks of Dell Inc. or its subsidiaries. Other
trademarks may be trademarks of their respective owners.

Chapter 1: Working on your computer........................................................................................... 6
Safety instructions.............................................................................................................................................................. 6
Before working inside your device.............................................................................................................................6
Safety precautions.........................................................................................................................................................7
Electrostatic discharge—ESD protection................................................................................................................7
ESD field service kit ..................................................................................................................................................... 8
Transporting sensitive components.......................................................................................................................... 9
After working inside your device................................................................................................................................9
Chapter 2: Stands........................................................................................................................10
Fixed stand.......................................................................................................................................................................... 10
Installing the device on a fixed stand...................................................................................................................... 10
Removing the device from a fixed stand................................................................................................................18
Monitor tilt angle......................................................................................................................................................... 22
Pro 1.0 Height-adjustable stand-HAS...........................................................................................................................22
Installing the device on a Pro 1 height-adjustable stand....................................................................................22
Removing the device from Pro 1 height-adjustable stand.................................................................................30
Stand tilt, pivot, and swivel images.........................................................................................................................34
Offset VESA mount.......................................................................................................................................................... 34
Installing device on offset VESA mount.................................................................................................................34
Removing the device from offset VESA mount....................................................................................................41
Pro 2 Height-adjustable stand-HAS............................................................................................................................. 43
Installing the device on a Pro 2 height-adjustable stand................................................................................... 43
Removing the device from a Pro 2 height-adjustable stand............................................................................ 58
Stand tilt, pivot, and swivel images........................................................................................................................ 62
Wall Mount..........................................................................................................................................................................65
Installing device on Wall Mount............................................................................................................................... 65
Removing the device from Wall Mount..................................................................................................................80
Chapter 3: Removing and installing components......................................................................... 88
Recommended tools......................................................................................................................................................... 88
Screw List........................................................................................................................................................................... 88
Major components of your system............................................................................................................................... 90
Hard-drive assembly..........................................................................................................................................................91
Removing the hard-drive assembly......................................................................................................................... 91
Installing the hard-drive assembly...........................................................................................................................92
Hard-drive bracket............................................................................................................................................................94
Removing the hard-drive bracket............................................................................................................................94
Installing the hard-drive bracket..............................................................................................................................94
Hard drive........................................................................................................................................................................... 95
Removing the hard drive........................................................................................................................................... 95
Installing the hard drive............................................................................................................................................. 96
Solid-state drive in the hard-drive bay.........................................................................................................................97
Removing the M.2 2230 solid-state drive............................................................................................................. 98
Contents
Contents 3

Installing the M.2 2230 solid-state drive............................................................................................................... 99
Removing the M.2 2280 solid-state drive........................................................................................................... 100
Installing the M.2 2280 solid-state drive.............................................................................................................. 101
Solid-state drive daughter board................................................................................................................................. 102
Removing the daughter board................................................................................................................................ 102
Installing the solid-state drive daughter board...................................................................................................103
Cover.................................................................................................................................................................................. 104
Removing the cover.................................................................................................................................................. 104
Installing the cover.................................................................................................................................................... 105
Memory module............................................................................................................................................................... 106
Removing the memory module...............................................................................................................................106
Installing the memory module................................................................................................................................. 107
WLAN card........................................................................................................................................................................108
Removing the WLAN card....................................................................................................................................... 108
Installing the WLAN card......................................................................................................................................... 109
Internal solid-state drive.................................................................................................................................................110
Removing the solid-state drive............................................................................................................................... 110
Installing the solid-state drive.................................................................................................................................. 111
eMMC Storage module................................................................................................................................................... 113
Removing the eMMC storage module...................................................................................................................113
Installing the eMMC storage module..................................................................................................................... 113
System fan......................................................................................................................................................................... 114
Removing the system fan.........................................................................................................................................114
Installing the system fan........................................................................................................................................... 115
Power button.....................................................................................................................................................................116
Removing the power button.................................................................................................................................... 116
Installing the power button...................................................................................................................................... 117
Coin-cell battery............................................................................................................................................................... 119
Removing the coin-cell battery...............................................................................................................................119
Installing the coin-cell battery................................................................................................................................ 120
System board.....................................................................................................................................................................121
Removing the system board.................................................................................................................................... 121
Installing the system board......................................................................................................................................122
Heat-sink............................................................................................................................................................................124
Removing the heat-sink........................................................................................................................................... 124
Installing the heat-sink............................................................................................................................................. 125
Replacing the chassis......................................................................................................................................................127
Chapter 4: Software.................................................................................................................. 128
Drivers and downloads................................................................................................................................................... 128
Chapter 5: System setup........................................................................................................... 129
BIOS overview..................................................................................................................................................................129
Entering BIOS setup program.......................................................................................................................................129
Boot menu................................................................................................................................................................... 129
Navigation keys................................................................................................................................................................ 130
Boot Sequence................................................................................................................................................................. 130
System setup options..................................................................................................................................................... 130
Updating the BIOS...........................................................................................................................................................139
4Contents

Updating the BIOS in Windows.............................................................................................................................. 139
Updating the BIOS in Linux and Ubuntu.............................................................................................................. 139
Updating the BIOS using the USB drive in Windows........................................................................................ 139
Updating the BIOS from the F12 One-Time boot menu...................................................................................140
System and setup password..........................................................................................................................................141
Assigning a system setup password...................................................................................................................... 141
Deleting or changing an existing system setup password................................................................................ 141
Clearing BIOS (System Setup) and System passwords.........................................................................................142
Chapter 6: Troubleshooting....................................................................................................... 143
Dell SupportAssist Pre-boot System Performance Check diagnostics.............................................................. 143
Running the SupportAssist Pre-Boot System Performance Check.............................................................. 143
Diagnostic LED................................................................................................................................................................. 144
Recovering the operating system................................................................................................................................144
Real-Time Clock (RTC Reset)...................................................................................................................................... 145
Backup media and recovery options........................................................................................................................... 145
WiFi power cycle..............................................................................................................................................................145
Chapter 7: Getting help and contacting Dell...............................................................................146
Contents 5

Working on your computer
Topics:
•Safety instructions
Safety instructions
Use the following safety guidelines to protect your computer from potential damage and to ensure your personal safety. Unless
otherwise noted, each procedure included in this document assumes that you have read the safety information that shipped
with your computer.
WARNING: Before working inside your computer, read the safety information that is shipped with your
computer. For more safety best practices, see the Regulatory Compliance home page at www.dell.com/
regulatory_compliance.
WARNING: Disconnect your computer from all power sources before opening the computer cover or panels.
After you finish working inside the computer, replace all covers, panels, and screws before connecting your
computer to an electrical outlet.
CAUTION: To avoid damaging the computer, ensure that the work surface is flat, dry, and clean.
CAUTION: To avoid damaging the components and cards, handle them by their edges, and avoid touching the
pins and the contacts.
CAUTION: You should only perform troubleshooting and repairs as authorized or directed by the Dell technical
assistance team. Damage due to servicing that is not authorized by Dell is not covered by your warranty. See the
safety instructions that is shipped with the product or at www.dell.com/regulatory_compliance.
CAUTION: Before touching anything inside your computer, ground yourself by touching an unpainted metal
surface, such as the metal at the back of the computer. While you work, periodically touch an unpainted metal
surface to dissipate static electricity which could harm internal components.
CAUTION: When you disconnect a cable, pull it by its connector or its pull tab, not the cable itself. Some cables
have connectors with locking tabs or thumbscrews that you must disengage before disconnecting the cable.
When disconnecting cables, keep them evenly aligned to avoid bending the connector pins. When connecting
cables, ensure that the ports and the connectors are correctly oriented and aligned.
CAUTION: Press and eject any installed card from the media-card reader.
CAUTION: Exercise caution when handling Lithium-ion batteries in laptops. Swollen batteries should not be used
and should be replaced and disposed properly.
NOTE: The color of your computer and certain components may appear differently than shown in this document.
Before working inside your device
About this task
To avoid damaging your device, perform the following steps before you begin working inside the device:
Steps
1. Ensure that you follow the Safety Instruction.
1
6 Working on your computer

2. Ensure that your work surface is flat and clean to prevent the device cover from being scratched.
3. Save and close all open files and exit all open applications.
4. Turn off your device.
5. Disconnect your device and all attached devices from their electrical outlets.
Safety precautions
The safety precautions chapter details the primary steps to be taken before performing any disassembly instructions.
Observe the following safety precautions before you perform any installation or break/fix procedures involving disassembly or
reassembly:
●Turn off the system and all attached peripherals.
●Disconnect the system and all attached peripherals from AC power.
●Disconnect all network cables, telephone, and telecommunications lines from the system.
●Use an ESD field service kit when working inside any desktop to avoid electrostatic discharge (ESD) damage.
●After removing any system component, carefully place the removed component on an anti-static mat.
●Wear shoes with non-conductive rubber soles to reduce the chance of getting electrocuted.
Standby power
Dell products with standby power must be unplugged before you open the case. Systems that incorporate standby power are
essentially powered while turned off. The internal power enables the system to be remotely turned on (wake on LAN) and
suspended into a sleep mode and has other advanced power management features.
Unplugging, pressing and holding the power button for 20 seconds should discharge residual power in the system board.
Bonding
Bonding is a method for connecting two or more grounding conductors to the same electrical potential. This is done through
the use of a field service electrostatic discharge (ESD) kit. When connecting a bonding wire, ensure that it is connected to bare
metal and never to a painted or non-metal surface. The wrist strap should be secure and in full contact with your skin, and
ensure that you remove all jewelry such as watches, bracelets, or rings prior to bonding yourself and the equipment.
Electrostatic discharge—ESD protection
ESD is a major concern when you handle electronic components, especially sensitive components such as expansion cards,
processors, memory DIMMs, and system boards. Very slight charges can damage circuits in ways that may not be obvious, such
as intermittent problems or a shortened product life span. As the industry pushes for lower power requirements and increased
density, ESD protection is an increasing concern.
Due to the increased density of semiconductors used in recent Dell products, the sensitivity to static damage is now higher than
in previous Dell products. For this reason, some previously approved methods of handling parts are no longer applicable.
Two recognized types of ESD damage are catastrophic and intermittent failures.
●Catastrophic – Catastrophic failures represent approximately 20 percent of ESD-related failures. The damage causes
an immediate and complete loss of device functionality. An example of catastrophic failure is a memory DIMM that has
received a static shock and immediately generates a "No POST/No Video" symptom with a beep code emitted for missing or
nonfunctional memory.
●Intermittent – Intermittent failures represent approximately 80 percent of ESD-related failures. The high rate of
intermittent failures means that most of the time when damage occurs, it is not immediately recognizable. The DIMM
receives a static shock, but the tracing is merely weakened and does not immediately produce outward symptoms related to
the damage. The weakened trace may take weeks or months to melt, and in the meantime may cause degradation of memory
integrity, intermittent memory errors, etc.
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:
Working on your computer 7

●Use a wired ESD wrist strap that is properly grounded. The use of wireless anti-static straps is no longer allowed; they do not
provide adequate protection. Touching the chassis before handling parts does not ensure adequate ESD protection on parts
with increased sensitivity to ESD damage.
●Handle all static-sensitive components in a static-safe area. If possible, use anti-static floor pads and workbench pads.
●When unpacking a static-sensitive component from its shipping carton, do not remove the component from the anti-static
packing material until you are ready to install the component. Before unwrapping the anti-static packaging, ensure that you
discharge static electricity from your body.
●Before transporting a static-sensitive component, place it in an anti-static container or packaging.
ESD field service kit
The unmonitored Field Service kit is the most commonly used service kit. Each Field Service kit includes three main components:
anti-static mat, wrist strap, and bonding wire.
Components of an ESD field service kit
The components of an ESD field service kit are:
●Anti-Static Mat – The anti-static mat is dissipative and parts can be placed on it during service procedures. When using an
anti-static mat, your wrist strap should be snug and the bonding wire should be connected to the mat and to any bare metal
on the system being worked on. Once deployed properly, service parts can be removed from the ESD bag and placed directly
on the mat. ESD-sensitive items are safe in your hand, on the ESD mat, in the system, or inside a bag.
●Wrist Strap and Bonding Wire – The wrist strap and bonding wire can be either directly connected between your wrist
and bare metal on the hardware if the ESD mat is not required, or connected to the anti-static mat to protect hardware that
is temporarily placed on the mat. The physical connection of the wrist strap and bonding wire between your skin, the ESD
mat, and the hardware is known as bonding. Use only Field Service kits with a wrist strap, mat, and bonding wire. Never
use wireless wrist straps. Always be aware that the internal wires of a wrist strap are prone to damage from normal wear
and tear, and must be checked regularly with a wrist strap tester in order to avoid accidental ESD hardware damage. It is
recommended to test the wrist strap and bonding wire at least once per week.
●ESD Wrist Strap Tester – The wires inside of an ESD strap are prone to damage over time. When using an unmonitored
kit, it is a best practice to regularly test the strap prior to each service call, and at a minimum, test once per week. A
wrist strap tester is the best method for doing this test. If you do not have your own wrist strap tester, check with your
regional office to find out if they have one. To perform the test, plug the wrist-strap's bonding-wire into the tester while it is
strapped to your wrist and push the button to test. A green LED is lit if the test is successful; a red LED is lit and an alarm
sounds if the test fails.
●Insulator Elements – It is critical to keep ESD sensitive devices, such as plastic heat sink casings, away from internal parts
that are insulators and often highly charged.
●Working Environment – Before deploying the ESD Field Service kit, assess the situation at the customer location. For
example, deploying the kit for a server environment is different than for a desktop or portable environment. Servers are
typically installed in a rack within a data center; desktops or portables are typically placed on office desks or cubicles. Always
look for a large open flat work area that is free of clutter and large enough to deploy the ESD kit with additional space to
accommodate the type of system that is being repaired. The workspace should also be free of insulators that can cause an
ESD event. On the work area, insulators such as Styrofoam and other plastics should always be moved at least 12 inches or
30 centimeters away from sensitive parts before physically handling any hardware components
●ESD Packaging – All ESD-sensitive devices must be shipped and received in static-safe packaging. Metal, static-shielded
bags are preferred. However, you should always return the damaged part using the same ESD bag and packaging that the
new part arrived in. The ESD bag should be folded over and taped shut and all the same foam packing material should be
used in the original box that the new part arrived in. ESD-sensitive devices should be removed from packaging only at an
ESD-protected work surface, and parts should never be placed on top of the ESD bag because only the inside of the bag is
shielded. Always place parts in your hand, on the ESD mat, in the system, or inside an anti-static bag.
●Transporting Sensitive Components – When transporting ESD sensitive components such as replacement parts or parts
to be returned to Dell, it is critical to place these parts in anti-static bags for safe transport.
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.
8Working on your computer

Transporting sensitive components
When transporting ESD sensitive components such as replacement parts or parts to be returned to Dell, it is critical to place
these parts in anti-static bags for safe transport.
After working inside your device
About this task
After you complete any replacement procedure, ensure that you connect any external devices, cards, and cables before turning
on your device.
Steps
1. Replace all screws and ensure that no stray screws remain inside your device.
2. Connect your computer and all attached devices to their electrical outlets.
3. Turn on your device.
4. If required, verify that the device works correctly by running ePSA diagnostics.
Working on your computer 9

Stands
Topics:
•Fixed stand
•Pro 1.0 Height-adjustable stand-HAS
•Offset VESA mount
•Pro 2 Height-adjustable stand-HAS
•Wall Mount
Fixed stand
Installing the device on a fixed stand
Steps
1. Align and insert the slots on the fixed stand into the tab on the stand base.
2. Lift and tilt the stand base.
3. Tighten the captive screw to secure the stand to the base.
4. Slide the release latch on the stand, until you hear a click, to release the stand cover.
2
10 Stands

5. Slide and lift the cover to release it from the stand.
6. Remove the screw that secures the stand mounting bracket to the stand.
7. Lift the mounting bracket to release the hooks on the bracket from the slots on the stand.
Stands 11

8. To avoid any damage to the monitor, ensure that you place the monitor on a protective sheet.
9. Align the screws on the mounting bracket with the screw holes on the monitor.
10. Tighten the four captive screws to secure the mounting bracket to the monitor.
12 Stands

11. Select the height at which you want to mount the monitor and align the hooks on the mounting bracket with the slots on the
stand.
12. Replace the screw to secure the fixed stand to the monitor.
Stands 13

13. Align the vents on the device with the vents on the stand cover.
14. Lower the device in the stand until you hear a click.
15. Connect the power, network, keyboard, mouse, and display cables to the device and to the power outlet.
NOTE: To avoid any pinching or crimping of the cables while closing the stand cover, it is recommended that you route
the cables as indicated in the image.
14 Stands

NOTE: All the cables and ports are used depending on the peripherals chosen and the configuration of the computer.
16. Slide the back cover, along with the device, into the stand until you hear a click.
Stands 15

17. Lock the device and the stand cover.
16 Stands

18. Press the power button to turn on the device.
Stands 17

Removing the device from a fixed stand
Prerequisites
1. Follow the procedure in before working inside your device.
Steps
1. Unlock the device and the stand cover.
18 Stands

2. Slide the release latch on the stand until you hear a click to release the stand cover.
3. Slide and lift the back cover to release it from the stand.
Stands 19

4. Disconnect the keyboard, mouse, network, power, and display cable from the device.
NOTE: All the cables and ports are used depending on the peripherals chosen and the configuration of the computer.
20 Stands