HP Compaq NX7300 Maintenance And Service Manual page 148

10. Lift the front edge of the system board 1 until it rests at
an angle.
11. Slide the system board 2 forward until the rear-right section
of the system board 3 is clear of the screw boss 4 on the
system board frame.
12. Remove the system board 5 from the base enclosure.
Removing the System Board
Reverse the above procedure to install the system board.
Maintenance and Service Guide
Removal and Replacement Procedures
5–55