Dell OptiPlex 790 (Early 2011) - Manual (Page 51)

System Board
17
Removing The System Board
1. Follow the procedures in Before Working Inside Your Computer .
2. Remove the cover .
3. Remove the front bezel .
4. Remove the expansion card .
5. Remove the heat sink and processor .
6. Disconnect all the cables connected to the system board.
7. Remove the screws that secure the system board to the computer.
8. Slide the system board towards the front of the computer.
51