System Board; System Board R - Dell OptiPlex 3000 Small Form Factor Service Manual

Steps
1. Place and align the screw holes on the power-supply unit to the screw holes on the chassis.
2. Replace the three (M6-32) screws to secure the power-supply unit to the chassis.
3. Route the power-supply cables through the routing guides on the chassis.
4. Connect the power-supply cables to the connectors on the system board.
Next steps
1. Install the disk-drive cage.
2. Install the 3.5-inch hard-drive.
3. Install the 2.5-inch hard-drive.
4. Install the front bezel.
5. Install the side cover.
6. Follow the procedure in

System board

System board r

The following image indicates the slots and connectors on your system board:
1. Intrusion-switch cable
2. Processor-power cable
3. Processor-fan cable
4. UDIMM slots
From the left (a>b):
DIMM 1
DIMM 2
5. Power-button cable
6. System-power cable
7. M.2 2230/2280 solid-state drive slot
70 Removing and installing components
after working inside your computer.