HP EliteDesk 705 G1 Desktop Mini Maintenance And Service Manual page 79

6. Slide the system board toward the front of the computer to disengage the I/O panel (1), and then lift the
system board out of the computer (2).
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 69