HP Compaq Presario,Presario C300 Maintenance And Service Manual page 143

9. Remove the two PM2.5×5.0 screws 1 that secure the
system board and USB/audio board to the top cover.
10. Remove the USB/audio board 2 from the top cover.
11. If it is necessary to replace the USB/audio board cable,
disconnect the cable 3 from the USB/audio board.
✎
The USB/audio board is available using spare part number
409079-001. The USB/audio board cable is included with the
USB/audio board and is also available in the Cable Kits, spare
part numbers 435781-001 (for use with HP G3000 computer
models) and 436186-001 (for use with Compaq Presario
C300 computer models).
Removing the USB/Audio Board
Maintenance and Service Guide
Removal and Replacement Procedures
5–49