HP Pavilion DV4-2155 Maintenance And Service Manual page 89

Remove the USB board and cable:
1. Turn the computer right-side up, with the right side toward you.
2. Disconnect the USB board cable 1 from the system board.
3. Remove the cable 2 from the base enclosure clips.
4. Remove the Phillips PM2.5×3.0 screw 3 that secures the USB board to the computer.
5. Lift the USB board 4 straight up to remove it from the computer.
Reverse this procedure to install the USB board.
Maintenance and Service Guide
Removal and replacement procedures
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