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OptiPlex 3090 Small Form Factor Service Manual

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Removing the system board

Prerequisites

  1. Follow the procedure in Before working inside your computer.
  2. Remove the side cover.
  3. Remove the front bezel.
  4. Remove the 3.5/2.5-inch hard-drive assembly.
  5. Remove the solid-state drive.
  6. Remove the WLAN card.
  7. Remove the heat-sink and fan assembly.
  8. Remove the memory modules.
  9. Remove the processor.

About this task

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

System board removal

System board removal

Steps

  1. Remove the single (6x32) screw that secures the I/O panel to the chassis.
  2. Lift the I/O panel away from the chassis.
  3. Disconnect the intrusion switch cable from the connector on the system board.
  4. Disconnect the system board power supply cables from the connector on the system board.
  5. Disconnect the power button switch cable from the connector on the system board..
  6. Disconnect the system fan cable from the connector on the system board..
  7. Disconnect the processor power supply cable from the connector on the system board.
  8. Disconnect the SATA cables from the connector on the system board.
  9. Disconnect the SATA power cable from the connector on the system board.
  10. Disconnect the internal speaker cable from the connector on the system board.
  11. Remove the seven (6x32) screws and the single standoff (M2x4) screw which secure the system board to the chassis.
  12. Free the system board from the back I/O panel by sliding it towards the right and lift the system board out of the chassis.

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