Dell OptiPlex 5490 Service Manual page 71

5. Remove the hard drive.
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 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 cables off the display-assembly base.
shield.
bracket.
Removing and installing components 71