Dell OptiPlex 5480 All-in-One Service Manual page 63

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.
NOTE: Before disconnecting the cables from the system board, note the location of the connectors so that you can
reconnect the cables correctly after you replace the system board.
2. Remove the stand.
3. Remove the cable cover
4. Remove the back cover.
5. Remove the system-board
6. Remove the memory module.
7. Remove the wireless card.
8. Remove the hard drive.
9. Remove the M.2 2230 solid-state
10. Remove the M.2 2280 solid-state drive/Intel
11. Remove the heat sink.
12. Remove the processor.
13. Remove the coin-cell.
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) connector
3. Processor
5. Camera cable connector
7. System-fan cable connector
9. LPC debug card connector
11. SIO-signal cable connector
13. Audio-board cable connector
(optional).
shield.
drive.
Optane.
2. Intrusion switch
4. Display back-light cable connector
6. M.2 2230/2280 solid-state drive/Intel Optane PCIe connector
8. Memory module
10. Hard-drive connector
12. SIO-power cable connector
14. Microphone-module cable connector
Removing and installing components 63