Dell OptiPlex 3000 Micro Service Manual page 52

Steps
1. Align and lower the system board into the system until the connectors at the back of the system board align with the slots
on the chassis, and the screw holes on the system board align with the standoffs on the system.
2. Replace the five (M3x5) screws and two (M3x4L) screws that secure the system board to the chassis.
3. Align the slot on the speaker support with system board and place the hard drive support on the system board.
4. Replace the screw (M3x5) to secure the speaker support to the system board.
Next steps
1. Install the processor.
2. Install the speaker.
3. Install the memory module.
4. Install the heat sink.
5. Install the fan assembly.
6. Install the WLAN card.
7. Install the solid-state
8. Install the hard-drive assembly.
9. Install the side cover.
10. Follow the procedure in
52 Removing and installing components
drive.
after working inside your computer.