HP ProDesk 405 G1 Microtower - Troubleshooting Without Diagnostics; Before You Call for Technical Support

6. Slide the system board toward the front of the computer to disengage the I/O panel, and then lift
the system board out of the computer.
When reinstalling the system board, first insert the I/O panel back into the slots in the rear of the
chassis, and then align the board with the chassis screw holes.
NOTE: When replacing the system board, you must change the chassis serial number in the BIOS.
System board
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