HP Z1 Entry Tower G5 Maintenance And Service Manual page 75

9. Lift and slide the system board toward the front of the computer to disengage the rear connectors from
the chassis (1).
10. Lift the rear of the board (2), and then pull board toward the rear and up and out of the computer (3).
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 67