Dell OptiPlex 3280 Service Manual page 64

6. Remove the system-board
7. Remove the bottom cover.
8. Remove the rear-I/O
About this task
The following image indicates the location of the side-I/O board and provides a visual representation of the removal procedure.
Steps
1. Remove the two screws (M3x5) that secure the side-I/O board shield to the display-assembly base.
2. Lift and remove the side I/O-board shield off the side-I/O board.
3. Disconnect the SIO-signal cable, SIO-power cable, and audio-board cable from the connector on the system board.
4. Remove the SIO-signal cable, SIO-power cable, and audio-board cable from the routing guides on the display-assembly base.
5. Remove the two screws (M2.5x3.5) that secure the side-I/O board to the display-assembly base.
6. Lift and remove the side-I/O board with the cables off the display-assembly base.
64 Removing and installing components
shield.
bracket.