Dell OptiPlex 3090 Ultra Service Manual
Summary
The Dell OptiPlex 3090 Ultra Service Manual with regulatory model D13U provides repair instructions for this modular ultra-small form factor desktop. It covers electrostatic discharge (ESD) protection, ESD field service kit requirements, and component transport procedures. The guide documents stand options, module removal and installation, and internal component access for this compute-element form factor. Technicians servicing the OptiPlex 3090 Ultra can follow the modular disassembly workflow
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Opti Plex 3090 Ultra Service Manual
Regulatory Model: D13U Regulatory Type: D13U003 August 2021 Rev. A01
Page Summary Contents For Dell OptiPlex 3090 Ultra Service Manual
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Opti Plex 3090 Ultra Service Manual Regulatory Model: D13U Regulatory Type: D13U003 August 2021 Rev. A01
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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 d...
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Contents Chapter 1: Working on your computer........................................................................................... Safety instructions................................................
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Installing the cover......................................................................................................................................................99 Memory module.................
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Chapter 6: Troubleshooting........................................................................................................137 Dell Support Assist Pre-boot System Performance Check diagnostics....
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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 o...
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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. Discon...
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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 ...
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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...
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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 inse...
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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 fro...
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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 ca...
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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. St...
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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 th...
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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 clic...
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17. Lock the device and the stand cover. Stands
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18. Press the power button to turn on the device. Stands
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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. Stands
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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
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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....
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5. Pull the retention latch that secures the device to the stand chassis. 6. Lift the device from the cover. 7. Press and hold the power button while the device is unplugged to ground the system board...
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Monitor tilt angle Pro 1.0 Height-adjustable stand-HAS Installing the device on a Pro 1 height-adjustable stand Steps 1. Align and insert the slots on the height-adjustable stand into the tab on the s...
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4. To avoid any damage to the monitor, ensure that you place the monitor on a protective sheet. 5. For installing the height-adjustable stand to the monitor: a. Align and insert the hooks on the mount...
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6. For installing QR to VESA bracket for E-Series monitor or monitor without Quick Release support: a. Align the screw holes on the QR to VESA bracket with the screw holes on the monitor. b. Install t...
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7. To release the stand cover, slide the release latch until you hear a click. 8. Slide and lift the cover to release it from the stand. 9. Align the vents on the device with the vents on the stand co...
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11. 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 re...
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12. Slide the back cover, along with the device, into the stand until you hear a click. Stands
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13. Lock the device and the stand cover. Stands
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14. Press the power button to turn on the device. Stands
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Removing the device from Pro 1 height-adjustable stand Prerequisites 1. Follow the procedure in before working inside your device. Steps 1. Turn off your device. 2. Unlock the device and the stand cov...
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3. Slide the release latch on the stand until you hear a click to release the stand cover. 4. Slide and lift the back cover to release it from the stand. Stands
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5. 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....
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6. Pull the retention latch that secures the device to the stand chassis. 7. Lift the device from the cover. 8. Press and hold the power button while the device is unplugged to ground the system board...
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Stand tilt, pivot, and swivel images Offset VESA mount Installing device on offset VESA mount Steps 1. Align the screw holes on the device with the screw holes on the offset VESA mount. 2. Install the...
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3. To avoid any damage to the monitor, ensure that you place the monitor on a protective sheet. 4. Align the screw holes on the offset VESA mount with the screw holes on the monitor. 5. Install the fo...
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6. Insert the hooks on the mounting bracket of the monitor arm stand into the slots on the offset VESA mount on the monitor. 7. Lower the monitor on the monitor arm stand until you hear a click. Stand...
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8. To install the offset VESA mount on a Dell E-Series monitor: a. Align and install the four screws to secure the device to the offset VESA mount. Stands
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b. Remove the VESA cover from the back of the monitor and secure the offset VESA mount along with the device to the monitor. Stands
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Stands
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Stands
Manual Details
| Brand | Dell |
|---|---|
| Pages | 140 |
| File Size | 29.01 MB |
| Published | June 28, 2026 |
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Frequently Asked Questions
What safety precautions must I take before opening the device?
You must observe all listed safety precautions and use proper Electrostatic discharge (ESD) protection methods.
How do I perform a WiFi power cycle on my system?
Turn off your computer, modem, and wireless router. Wait 30 seconds, then turn them back on in order: router, modem, and finally the computer.
Where can I find specific support information for my Dell computer?
Visit www.dell.com/support and enter your Service Tag or Express Service Code to view relevant manuals and resources.