HP Pavilion DV6-1378 Maintenance And Service Manual page 169

2. Remove the two Phillips PM2.5×5.0 screws 1 that secure the
audio board to the computer.
3. Slide the audio board 2 back to disengage the audio
connectors from the base enclosure.
4. Remove the audio board 3.
5. Disconnect the audio board cable 4 from the audio board.
Removing the Audio Board
Reverse the above procedure to install the audio board.
Maintenance and Service Guide
Removal and Replacement Procedures
5–53