Dell OptiFlex 3000TC Service Manual page 43

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 (M3x4) screws to secure the system board to the computer chassis.
3. Align and place the speaker holder into the speaker holder slot on the system board.
4. Replace the screw (M3x5) to secure the speaker holder to the system board.
Next steps
1. Install the heat sink.
2. Install the WLAN card.
3. Install the memory .
4. Install the solid-state drive
5. Install the speaker.
6. Install the side cover.
7. Follow the procedure in
assembly.
after working inside your computer.
Removing and installing components 43