System Board; Removing The System Board - Dell OptiPlex 7780 All-In-One Service Manual

Steps
1. Align the screw holes on the rear-I/O bracket with the screw holes on the display-assembly base.
2. Replace the three screws (M3x5) to secure the rear-I/O bracket to the display-assembly base.
3. Route the power-supply cables through the routing guide on the rear-I/O bracket.
4. Align the screw hole on the power-supply socket with the screw hole on the rear-I/O bracket, and place it in the slot on the rear-I/O
bracket.
5. Replace the screw (M3x5) to secure the power-supply socket to the rear-I/O bracket.
Next steps
1. Install the bottom cover.
2. Install the system-board
3. Install the back cover.
4. Install the cable cover (optional).
5. Install the stand.
6. Follow the procedure in

System board

Removing the system board

Prerequisites
1. Follow the procedure in
NOTE: Your computer's Service Tag is stored in the system board. You must enter the Service Tag in the BIOS setup
program after you replace the system board.
NOTE: Replacing the system board removes any changes you have made to the BIOS using the BIOS setup program.
You must make the appropriate changes again after you replace the system board.
2. Remove the stand.
3. Remove the cable cover
4. Remove the back cover.
5. Remove the hard drive.
6. Remove the system-board
7. Remove the memory modules.
8. Remove the wireless card.
9. Remove the M.2 2230 solid-state
10. Remove the M.2 2280 solid-state drive/Intel Optane
11. Remove the heat sink.
12. Remove the processor.
13. Remove the coin-cell battery.
14. Remove the bottom cover.
15. Remove the rear-I/O bracket.
About this task
The following image indicates the connectors on your system board.
shield.
After working inside your computer.
Before working inside your
(optional).
shield.
drive.
computer.
memory.
Removing and installing components 59