OptiPlex 5090 Tower Service Manual

1. Follow the procedure in before 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.
   NOTE Before disconnecting the cables from the system board, note the location of the connectors so that you can reconnect the cables correctly after you replace the system board.
2. Remove the side cover.
3. Remove the front bezel.
4. Remove the fan duct.
5. Remove the memory module.
6. Remove the WLAN.
7. Remove the M.2 2230 SSD/M.2 2280 SSD.
8. Remove the coin-cell battery.
9. Remove the graphics card.
10. Remove the powered GPU.
    NOTE This step is required only if the system is configured with powered GPU.
11. Remove the speaker.
12. Remove the intrusion switch.
13. Remove the processor fan and heat-sink assembly.
14. Remove the processor.

The following image indicates the connectors on your system board.

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