Installing The System Board - Dell OptiPlex 5090 Small Form Factor Service Manual

Steps
1. Remove the screw (6-32) that secures the front I/O bracket to the chassis.
2. Lift the front I/O panel away from the chassis.
3. Disconnect the following cables from their connectors on the system board:
● Intrusion switch
● ATX system board power supply cables
● Power button switch
● ATX CPU power supply cable
● SATA data cables
● SATA power cable
● Fan cable
4. Remove the four screws (6-32) and the single standoff screw (M2x4) which secure the system board to the chassis.
5. 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.

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 location of the system board and provides a visual representation of the installation procedure.
Removing and installing components 59