Dell OptiPlex 3000 Tower Service Manual page 90

Steps
1. Slide the front I/O-ports on the system board into the front I/O-slots on the chassis and align the screw holes on the
system board with the screw holes on the chassis.
2. Replace the (M2x4) screw screw to secure the system board to the chassis.
3. Replace the eight (#6-32) screws that secure the system board to the chassis.
4. Route the cables through the routing guides on the chassis and connect the power and HDD cables to their respective
connectors on the system board.
5. Align the front I/O-bracket with the slots on the chassis.
6. Replace the (#6-32) screw that secures the front I/O-bracket to the chassis.
Next steps
1. Install the processor.
2. Install the processor fan and heat-sink
3. Install the coin-cell battery.
4. Remove the intrusion
5. Remove the speaker.
6. Install the graphics card.
7. Install the M.2 2230 SSD/M.2 2280
8. Install the WLAN.
9. Install the memory module.
10. Install the fan duct
11. Install the front bezel.
12. Install the side cover.
13. Follow the procedure in
NOTE: Your computer's Service Tag is stored in the system board. You must enter the Service Tag in the BIOS setup
program after you replace the system board.
NOTE: Replacing the system board removes any changes that you have made to the BIOS using the BIOS setup
program. You must make the appropriate changes again after you replace the system board.
90 Removing and installing components
assembly.
switch.
SSD.
after working inside your computer.