HP Compaq NX7300 Maintenance And Service Manual page 153

Removal and Replacement Procedures
3. Remove the two Torx8 T8M2.5×4.0 screws 1 that secure
the USB/audio board to the base enclosure.
4. Lift the left side of the USB/audio board 2 to disengage it
from the base enclosure. When lifting the board, lift the left
side up and rotate it so that the right side clears the metal
bracket attached to the base enclosure, and then lift the board
out of the enclosure.
Removing the USB/Audio Board
Reverse the above procedure to install the USB/audio board.
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