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OptiPlex 5090 Tower Service Manual

PDF

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.

System board layout

  1. Intrusion switch connector
  2. Video connector
  3. ATX CPU power connector
  4. Memory module slot
  5. Memory module slot
  6. Power button connector
  7. SD card reader connector
  8. ATX system power connector
  9. M.2 PCIe SSD connector
  10. Coin-cell battery
  11. SATA3 connector (white)
  12. SATA0 connector (blue)
  13. M.2 WLAN connector
  14. M.2 PCIe SSD connector
  15. PCIe x4 (Slot4)
  16. PCIe x16 (Slot3)
  17. PCIe x1 (Slot2)
  18. PCIe x1 (Slot1)
  19. Type-C connector
  20. Processor socket
  21. Keyboard and Mouse serial connector

The following images indicate the location of the system board and provide a visual representation of the installation procedure.

Place the system board into the chassis

Installing the system board

Replace the eight screws to secure the system board

Replace the two screws to secure the I/O bracket

Steps

  1. Slide the front I/O-ports on the system board into the front I/O-slots on the chassis and align the screw holes on the system board with the screw holes on the chassis.
  2. Replace the (#6-32) screw to secure the system board to the chassis.
  3. Replace the eight screws (#6-32) that secure the system board to the chassis.
  4. Route the power cable through the routing guides on the chassis and connect the power cables to their respective connectors on the system board.
  5. Align the front I/O-bracket with the slots on the chassis.
  6. Replace the two (#6-32) screws to secure the front I/O-bracket to the chassis.

Next steps

  1. Install the processor.
  2. Install the processor fan and heat-sink assembly.
  3. Install the coin-cell battery.
  4. Remove the intrusion switch.
  5. Remove the speaker.
  6. Install the powered GPU.
    NOTE This step is required only if the system is configured with powered GPU.
  7. Install the graphics card.
  8. Install the M.2 2230 SSD/M.2 2280 SSD.
  9. Install the WLAN.
  10. Install the memory module.
  11. Install the fan duct
  12. Install the front bezel.
  13. Install the side cover.
  14. 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 that you have made to the BIOS using the BIOS setup program. You must make the appropriate changes again after you replace the system board.
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