HP Pavilion DV4-2155 Maintenance And Service Manual page 83

Remove the modem module:
1. Disconnect the modem module cable 1 from the modem module.
2. Remove the two Phillips PM2.0×4.0 screws 2 that secure the modem module to the system board
3. Lift up on the back of the modem module 3 to disconnect it from the system board.
4. Remove the modem module.
Reverse the above procedure to install the modem module.
Maintenance and Service Guide
Removal and replacement procedures
4–41