Dell OptiPlex 7480 All-In-One Service Manual page 62

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.
1. Power-supply unit (PSU) cable connector
2. Display back-light cable connector
3. Camera cable connector
4. M.2 2230/2280 solid-state drive/Intel Optane PCIe connector
5. System-fan cable connector
6. Memory modules
7. LPC debug card connector
8. Hard-drive connector
9. M.2 2230/2280 solid-state drive PCIe connector
10. SIO-signal cable connector
62 Removing and installing components
(optional).
shield.
drive.
memory.