HP Compaq NX7300 Maintenance And Service Manual page 150

3. Remove the three Torx8 T8M2.5×4.0 screws 1 that secure
the system board frame to the base enclosure.
4. Remove the audio board and USB board cables 2 from the
base enclosure.
5. Lift the rear edge of the system board frame 3 until it
disengages from the base enclosure.
6. Remove the system board frame.
Removing the System Board Frame
Maintenance and Service Guide
Removal and Replacement Procedures
5–57