When replacing the system board, you must also change the chassis serial number in the BIOS.

7.Remove the power supply (Power Supply on page 126).

8.Disconnect all data and power cables from the system board.

9.Disconnect the balance of the cables from the system board.

10.Remove the eight screws that secure the system board to the chassis (1). Figure 6-38Removing the system board

11.Slide the system board toward the front of the chassis, and then lift the board out of the computer

(2).

To install the system board, reverse the removal procedure.

Note the following when installing a system board:

●To insure correct installation while fastening the first two screws, press the system board firmly in place against the rear I/O panel so that the system board screw holes are aligned to the mounting holes in the chassis.

●When installing a system board, align the ports on the rear of the system board to cutouts in the rear of the chassis (keep EMI tabs on top of the connectors), and firmly slide toward the chassis rear until system board screw holes are aligned to mounting holes in the chassis.

●Ensure ground fingers make contact with the connectors on the system board and are not damaged.

●When installing the system board, recommended torque = 4-6 in-lbs.

●

●After installing a new system board, always update the system ROM version of the BIOS is being used on the computer. The latest system http:\\h18000.www1.hp.com/support/files.

to ensure that the latest ROM BIOS can be found at:

System Board 129