Installing The System Board - Dell OptiPlex 5090 Tower Service Manual

4. Remove the eight (#6-32) screws that secure the system board to the chassis.
5. Remove the (#6-32) screw that secures the system board to the chassis.
6. Lift the system board at an angle and remove the system board off the chassis.

Installing the system board

Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
About this task
The following image indicates the connectors on your system board.
1. Intrusion switch connector
2. Video connector
3. ATX CPU power connector
4. Memory module connector
5. Memory module connector
6. Power button connector
7. SD card reader connector
8. ATX system power connector
9. M.2 PCIe SSD connector
10. Coin-cell battery
11. SATA3 connector (white)
12. SATA0 connector (blue)
13. M.2 WLAN connector
14. M.2 PCIe SSD connector
15. PCIe x4 (Slot4)
16. PCIe x16 (Slot3)
17. PCIe x1 (Slot2)
Removing and installing components 61