Dell OptiPlex 5090 Tower and Small Form Factor Desktop Owner’s Manual

OptiPlex 5090 Tower and Small Form Factor Desktop

OptiPlex 5090 Tower
Service Manual
Regulatory Model: D29M Regulatory Type: D29M003 June 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.

Contents

Chapter 1: Working inside your computer………………………………………………………………………….. 6 Safety instructions………………………………………………………………………………………………………………………………………….. 6 Before working inside your computer……………………………………………………………………………………………………….. 6 Safety precautions………………………………………………………………………………………………………………………………………7 Electrostatic discharge–ESD protection………………………………………………………………………………………………….7 ESD field service kit ………………………………………………………………………………………………………………………………….. 8 Transporting sensitive components………………………………………………………………………………………………………….. 9 After working inside your computer…………………………………………………………………………………………………………..9
Chapter 2: Removing and installing components……………………………………………………………….. 10 Recommended tools……………………………………………………………………………………………………………………………………….10 Screw List………………………………………………………………………………………………………………………………………………………. 10 Major components of your system………………………………………………………………………………………………………………… 11 Side cover………………………………………………………………………………………………………………………………………………………. 12 Removing the side cover………………………………………………………………………………………………………………………….. 12 Installing the side cover……………………………………………………………………………………………………………………………. 13 Front bezel ……………………………………………………………………………………………………………………………………………………. 15 Removing the front bezel………………………………………………………………………………………………………………………….15 Installing the front bezel……………………………………………………………………………………………………………………………15 Fan shroud……………………………………………………………………………………………………………………………………………………… 16 Removing the fan duct…………………………………………………………………………………………………………………………….. 16 Installing the fan duct………………………………………………………………………………………………………………………………..17 Hard-drive assembly……………………………………………………………………………………………………………………………………….18 Removing the 2.5-inch hard-drive assembly…………………………………………………………………………………………… 18 Installing the 2.5-inch hard-drive assembly…………………………………………………………………………………………….. 19 3.5 in. hard-drive assembly…………………………………………………………………………………………………………………………… 20 Removing the 3.5-inch hard-disk drive assembly……………………………………………………………………………………20 Installing the 3.5-inch hard-disk drive assembly………………………………………………………………………………………21 Solid-state drive……………………………………………………………………………………………………………………………………………. 22 Removing the M.2 2230 PCIe solid-state drive……………………………………………………………………………………… 22 Installing the M.2 2230 PCIe solid-state drive……………………………………………………………………………………….. 23 Removing the M.2 2280 PCIe solid-state drive……………………………………………………………………………………… 24 Installing the M.2 2280 PCIe solid-state drive……………………………………………………………………………………….. 25 Memory module…………………………………………………………………………………………………………………………………………….. 26 Removing the memory module…………………………………………………………………………………………………………………26 Installing the memory module………………………………………………………………………………………………………………….. 27 SD card reader (optional)………………………………………………………………………………………………………………………………28 Removing the SD card reader…………………………………………………………………………………………………………………. 28 Installing the SD card reader…………………………………………………………………………………………………………………… 29 Processor fan and heat-sink assembly………………………………………………………………………………………………………… 30 Removing the processor fan and heat-sink assembly……………………………………………………………………………. 30 Installing the processor fan and heat-sink assembly………………………………………………………………………………. 31 Processor………………………………………………………………………………………………………………………………………………………. 32 Removing the processor…………………………………………………………………………………………………………………………..32

Contents

Installing the processor……………………………………………………………………………………………………………………………. 33 Graphics card………………………………………………………………………………………………………………………………………………… 35
Removing the graphics card……………………………………………………………………………………………………………………. 35 Installing the graphics card……………………………………………………………………………………………………………………… 36 Graphical processing unit……………………………………………………………………………………………………………………………… 37 Removing the powered GPU…………………………………………………………………………………………………………………… 37 Installing the powered GPU…………………………………………………………………………………………………………………….. 38 Coin-cell battery……………………………………………………………………………………………………………………………………………. 39 Removing the coin-cell battery………………………………………………………………………………………………………………..39 Installing the coin-cell battery…………………………………………………………………………………………………………………. 39 WLAN card……………………………………………………………………………………………………………………………………………………..40 Removing the WLAN card………………………………………………………………………………………………………………………..40 Installing the WLAN card…………………………………………………………………………………………………………………………..41 Slim optical-drive……………………………………………………………………………………………………………………………………………43 Removing the Slim optical drive……………………………………………………………………………………………………………….43 Installing the Slim optical drive…………………………………………………………………………………………………………………43 Speaker………………………………………………………………………………………………………………………………………………………….. 44 Removing the speaker………………………………………………………………………………………………………………………………44 Installing the speaker………………………………………………………………………………………………………………………………..45 Power button………………………………………………………………………………………………………………………………………………… 46 Removing the power button…………………………………………………………………………………………………………………….46 Installing the power button……………………………………………………………………………………………………………………… 47 Power-supply unit…………………………………………………………………………………………………………………………………………. 48 Removing the power-supply unit……………………………………………………………………………………………………………..48 Installing the power-supply unit……………………………………………………………………………………………………………….50 Intrusion switch…………………………………………………………………………………………………………………………………………….. 52 Removing the intrusion switch…………………………………………………………………………………………………………………52 Installing the intrusion switch…………………………………………………………………………………………………………………..53 Optional I/O modules (Type C/ HDMI/VGA/DP/Serial)……………………………………………………………………………. 54 Removing optional I/O modules (Type-C/HDMI/VGA/DP/Serial)………………………………………………………. 54 Installing optional I/O modules (Type-C/HDMI/VGA/DP/Serial)………………………………………………………… 55 System board………………………………………………………………………………………………………………………………………………… 56 Removing the system board……………………………………………………………………………………………………………………. 56 Installing the system board………………………………………………………………………………………………………………………. 61
Chapter 3: Software……………………………………………………………………………………………………..66 Drivers and downloads…………………………………………………………………………………………………………………………………..66
Chapter 4: System setup………………………………………………………………………………………………. 67 Boot menu……………………………………………………………………………………………………………………………………………………… 67 Navigation keys………………………………………………………………………………………………………………………………………………67 Boot Sequence……………………………………………………………………………………………………………………………………………….68 System setup options…………………………………………………………………………………………………………………………………….68 Updating the BIOS in Windows …………………………………………………………………………………………………………………….77 Updating BIOS on systems with BitLocker enabled……………………………………………………………………………….. 77 Updating your system BIOS using a USB flash drive………………………………………………………………………………78 System and setup password………………………………………………………………………………………………………………………….78 Assigning a system setup password……………………………………………………………………………………………………….. 79 Deleting or changing an existing system setup password……………………………………………………………………… 79

Contents

Chapter 5: Troubleshooting……………………………………………………………………………………………80 Dell SupportAssist Pre-boot System Performance Check diagnostics……………………………………………………….80 Running the SupportAssist Pre-Boot System Performance Check……………………………………………………….80 Diagnostic LED behavior………………………………………………………………………………………………………………………………. 80 Diagnostic error messages……………………………………………………………………………………………………………………………. 82 System error messages………………………………………………………………………………………………………………………………… 85 WiFi power cycle…………………………………………………………………………………………………………………………………………… 85
Chapter 6: Getting help and contacting Dell…………………………………………………………………….. 86

Contents

1
Working inside your computer

Safety instructions
Use the following safety guidelines to protect your computer from potential damage and to ensure your personal safety. Unless otherwise noted, each procedure included in this document assumes that you have read the safety information that shipped with your computer.
WARNING: Before working inside your computer, read the safety information that is shipped with your computer. For more safety best practices, see the Regulatory Compliance home page at www.dell.com/ regulatory_compliance. WARNING: Disconnect your computer from all power sources before opening the computer cover or panels. After you finish working inside the computer, replace all covers, panels, and screws before connecting your computer to an electrical outlet.
CAUTION: To avoid damaging the computer, ensure that the work surface is flat, dry, and clean.
CAUTION: To avoid damaging the components and cards, handle them by their edges, and avoid touching the pins and the contacts. CAUTION: You should only perform troubleshooting and repairs as authorized or directed by the Dell technical assistance team. Damage due to servicing that is not authorized by Dell is not covered by your warranty. See the safety instructions that is shipped with the product or at www.dell.com/regulatory_compliance. CAUTION: Before touching anything inside your computer, ground yourself by touching an unpainted metal surface, such as the metal at the back of the computer. While you work, periodically touch an unpainted metal surface to dissipate static electricity which could harm internal components. CAUTION: When you disconnect a cable, pull it by its connector or its pull tab, not the cable itself. Some cables have connectors with locking tabs or thumbscrews that you must disengage before disconnecting the cable. When disconnecting cables, keep them evenly aligned to avoid bending the connector pins. When connecting cables, ensure that the ports and the connectors are correctly oriented and aligned.
CAUTION: Press and eject any installed card from the media-card reader.
NOTE: The color of your computer and certain components may appear differently than shown in this document.
Before working inside your computer
About this task NOTE: The images in this document may differ from your computer depending on the configuration you ordered.
Steps 1. Save and close all open files and exit all open applications. 2. Shut down your computer. Click Start > Power > Shut down.
NOTE: If you are using a different operating system, see the documentation of your operating system for shut-down instructions.

Working inside your computer

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.
CAUTION: To disconnect a network cable, first unplug the cable from your computer and then unplug the cable from the network device.
5. Remove any media card and optical disc from your computer, if applicable.
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 inside your computer

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.

Working inside 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 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

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 require the following tools: Phillips #0 screwdriver Phillips #1 screwdriver Flat headed screwdriver Plastic scribe

Screw List

The following table shows the screw list and the images for different components.
NOTE: When removing screws from a component, it is recommended to note the screw type, the quantity of screws, and then place them in a screw storage box. This is to ensure that the correct number of screws and correct screw type is restored when the component is replaced.
NOTE: Some computers have magnetic surfaces. Ensure that the screws are not left attached to such surface when replacing a component.

NOTE: Screw color may vary with the configuration ordered.

Table 1. Screw list Component Side cover

Screw type #6-32

Quantity 2

Image

M.2 2230/2280 Solid-state drive WLAN card Power supply unit Processor fan and heat-sink assembly System board

M2x3.5

#6-32

#6-32 (Captive)

#6-32

Removing and installing components

Major components of your system

1. Side cover

Removing and installing components

2. Intrusion switch 3. Optical Disk Drive 4. 2.5-inch hard-disk drive assembly 5. Fan duct 6. Processor fan and heat-sink assembly 7. 3.5-inch hard-disk drive assembly 8. Memory module 9. Speaker 10. Front bezel 11. Chassis 12. System board 13. Powered Graphical processing unit 14. M.2 WLAN 15. Power Supply Unit
NOTE: Dell provides a list of components and their part numbers for the original system configuration purchased. These parts are available according to warranty coverages purchased by the customer. Contact your Dell sales representative for purchase options.
Side cover
Removing the side cover
Prerequisites 1. Follow the procedure in before working inside your computer.
NOTE: Ensure that you remove the security cable from the security-cable slot (if applicable).
About this task The following images indicate the location of the side cover and provide a visual representation of the removal procedure.

Removing and installing components

Steps 1. Loosen the two thumbscrews (#6-32) that secure the side cover to the computer. 2. Slide the side cover towards the rear of the computer and lift the cover away from the computer.
Installing the side 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 side cover and provides a visual representation of the installation procedure.

Removing and installing components

Steps 1. Locate the side cover slot on your computer. 2. Align the tabs on the side cover with the slots on the chassis. 3. Slide the side cover towards the front of the computer to install it. 4. Tighten the two thumbscrews (#6-32) to secure the side cover to the computer.
Next steps 1. Follow the procedure in after working inside your computer.

Removing and installing components

Front bezel
Removing the front bezel
Prerequisites 1. Follow the procedure in before working inside your computer. 2. Remove the side cover.
About this task The following images indicate the location of the front bezel and provide a visual representation of the removal procedure.

Steps 1. Pry the retention tabs to release the front bezel from the computer. 2. Slightly pull the front bezel and gently rotate to release the other tabs on the bezel from the slots in the computer chassis. 3. Remove the front bezel from the computer.
Installing the front bezel
Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure.

Removing and installing components

About this task The following image indicates the location of the front bezel and provides a visual representation of the installation procedure.

Steps 1. Position the front bezel to align the tabs on the bezel with the slots on the chassis. 2. Press the bezel until the tabs clicks into place.
Next steps 1. Install the side cover. 2. Follow the procedure in after working inside your computer.
Fan shroud
Removing the fan duct
Prerequisites 1. Follow the procedure in before working inside your computer. 2. Remove the side cover.
About this task The following images indicate the location of the fan duct and provide a visual representation of the removal procedure.

Removing and installing components

Steps 1. Press the retention tabs on both sides of the fan duct to release it. 2. Pull and remove the fan duct from the computer.
Installing the fan duct
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 fan duct and provides a visual representation of the installation procedure.

Removing and installing components

Steps 1. Position the fan duct to align it with the slots on the computer chassis. 2. Press the fan duct until it clicks into place.
Next steps 1. Install the side cover. 2. Follow the procedure in after working inside your computer.
Hard-drive assembly
Removing the 2.5-inch hard-drive assembly
Prerequisites 1. Follow the procedure in before working inside your computer. 2. Remove the side cover.
About this task The following images indicate the location of the 2.5-inch hard-drive assembly and provide a visual representation of the removal procedure.

Removing and installing components

Steps 1. Disconnect the hard-drive data and power cables from the connectors on the 2.5-inch hard-drive module. 2. Press the release tabs on both the sides of the hard-drive bracket to release it from the slots on the computer chassis. 3. Tilt the hard-drive assembly slightly at an angle. 4. Lift the hard-drive assembly from the computer.
NOTE: Note the orientation of the hard drive so that you can replace it correctly.
Installing the 2.5-inch hard-drive 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 2.5-inch hard-drive assembly and provides a visual representation of the installation procedure.

Removing and installing components

Steps 1. Align the hard-drive assembly at an angle to the slot on the computer. 2. Press the release tabs on the hard-drive bracket and slightly align back to insert the hard-drive assembly to the slot on the
computer chassis. 3. Connect the hard-drive data and power cables to the connectors on the 2.5-inch hard-drive module.
Next steps 1. Install the side cover. 2. Follow the procedure in after working inside your computer.
3.5 in. hard-drive assembly
Removing the 3.5-inch hard-disk drive assembly
Prerequisites 1. Follow the procedure in before working inside your computer. 2. Remove the side cover.

Removing and installing components

About this task
The following images indicate the location of the 3.5-inch hard-disk drive assembly and provide a visual representation of the removal procedure.

Steps 1. Disconnect the data and power cables from the 3.5-inch hard-disk drive module. 2. Remove the fours (#6-32) screws that secure the hard-disk drive to the chassis. 3. Slide the hard-disk drive away from the chassis.
Installing the 3.5-inch hard-disk drive 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 3.5-inch hard-disk drive assembly and provides a visual representation of the installation procedure.

Removing and installing components

Steps 1. Slide and insert the 3.5-inch hard-disk drive into the hard-disk drive slot. 2. Replace the fours (#6-32) screws to secure the hard-disk drive to the chassis. 3. Route the power cable and the data cable through the routing guides and connect the cables to the hard-disk drive.
Next steps 1. Install the side cover. 2. Follow the procedure in after working inside your computer.
Solid-state drive
Removing the M.2 2230 PCIe solid-state drive
Prerequisites 1. Follow the procedure in before working inside your computer. 2. Remove the side cover. 3. Remove the fan duct.
About this task The following images indicate the location of the solid-state drive and provide a visual representation of the removal procedure.

Removing and installing components

Steps 1. Remove the screw (M2x3.5) that secures the solid-state drive to the system board. 2. Slide and lift the solid-state drive off the system board.
Installing the M.2 2230 PCIe solid-state drive
Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure.
About this task The following image indicates the location of the solid-state drive and provides a visual representation of the installation procedure.

Removing and installing components

Steps 1. Align the notch on the solid-state drive with the tab on the solid-state drive connector. 2. Insert the solid-state drive at a 45-degree angle into the slot on the system board. 3. Replace the screw (M2x3.5) to secure the M.2 2230 solid-state drive to the system board.
Next steps 1. Install the fan duct. 2. Install the side cover. 3. Follow the procedure in after working inside your computer.
Removing the M.2 2280 PCIe solid-state drive
Prerequisites 1. Follow the procedure in before working inside your computer. 2. Remove the side cover. 3. Remove the fan duct.
About this task The following images indicate the location of the solid-state drive and provide a visual representation of the removal procedure.

Removing and installing components

Steps 1. Remove the screw (M2x3.5) that secures the solid-state drive to the system board. 2. Slide and lift the solid-state drive off the system board.
Installing the M.2 2280 PCIe solid-state drive
Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure.
About this task The following image indicates the location of the solid-state drive and provides a visual representation of the installation procedure.

Removing and installing components

Steps 1. Align the notch on the solid-state drive with the tab on the solid-state drive connector. 2. Insert the solid-state drive at a 45-degree angle into the slot on the system board. 3. Replace the screw (M2x3.5) to secure the M.2 2280 solid-state drive to the system board.
Next steps 1. Install the fan duct. 2. Install the side cover. 3. Follow the procedure in after working inside your computer.
Memory module
Removing the memory module
Prerequisites 1. Follow the procedure in before working inside your computer. 2. Remove the side cover.
About this task The following images indicate the location of the memory module and provide a visual representation of the removal procedure.

Removing and installing components

Steps 1. Pull the securing clips from both side of the memory module until the memory module pops up. 2. Slide and remove the memory module from the memory-module slot.
Installing the memory module
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.

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.
Next steps 1. Install the side cover. 2. Follow the procedure in after working inside your computer.
SD card reader (optional)
Removing the SD card reader
Prerequisites 1. Follow the procedure in before working inside your computer. 2. Remove the side cover. 3. Remove the fan duct. 4. Remove the memory module.
About this task The following images points to the location of the SD card reader and provide a visual representation of the removal procedure.

Removing and installing components

Steps 1. Unroute the cables from the routing guides on the chassis. 2. Disconnect the SD card reader from its connector on the system board.
Installing the SD card reader
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 SD card reader and provides a visual representation of the installation procedure.

Removing and installing components

Steps 1. Connect the SD card reader to its connector on the system board. 2. Route the cables through the routing guides on the chassis.
Next steps 1. Install the memory module. 2. Install the fan duct. 3. Install the side cover. 4. Follow the procedure in after working inside your computer.
Processor fan and heat-sink assembly
Removing the processor fan and heat-sink assembly
Prerequisites 1. Follow the procedure in before working inside your computer.
WARNING: The heat sink may become hot during normal operation. Allow sufficient time for the heat sink to cool before you touch it. CAUTION: For maximum cooling of the processor, do not touch the heat transfer areas on the heat sink. The oils in your skin

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Dell OptiPlex 5090 Tower and Small Form Factor Desktop Owner’s Manual

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