OptiPlex 3000 Tower Service Manual

Installing the system board

If you are replacing a component, remove the existing component before performing the installation procedure.

The following image indicates the connectors on your system board.

System board layout

The following images indicate the location of the system board and provide a visual representation of the installation procedure.

Place the system board into the chassis

Installing the system board

Replace the eight screws to secure the system board

Replace the two screws to secure the I/O bracket

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.
Replace the (M2x4) screw screw to secure the system board to the chassis.
Replace the eight (#6-32) screws that secure the system board to the chassis.
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.
Align the front I/O-bracket with the slots on the chassis.
Replace the (#6-32) screw that secures the front I/O-bracket to the chassis.

Install the processor.
Install the processor fan and heat-sink assembly.
Install the coin-cell battery.
Remove the intrusion switch.
Remove the speaker.
Install the graphics card.
Install the M.2 2230 SSD/M.2 2280 SSD.
Install the WLAN.
Install the memory module.
Install the fan duct
Install the front bezel.
Install the side cover.
Follow the procedure in after working inside your computer.
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.