Dell OptiPlex 7000 Tower Service Manual page 97

Steps
1. Remove the (#6-32) screw that secures the front I/O-bracket to the chassis.
2. Slide and remove the front I/O-bracket from the chassis.
3. Disconnect the power and HDD cables that are connected to the system board and unroute them from the routing guides on
the chassis.
Removing and installing components 97