HP Compaq nw8440, nc8430, nx8420 Notebook PCs - Maintenance and Service Guide

Removal and Replacement Procedures
Maintenance and Service Guide 5–67
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.
Removing the USB/Audio Board
Reverse the above procedure to install the USB/audio board.