HP Compaq Presario,Presario V3501 Maintenance And Service Manual page 94

Remove the system board:
Disconnect the power connector cable (1) from the system board.
1.
Remove the two black Phillips PM2.5×4.0 screws (2) that secure the system board to the computer.
2.
Use the optical drive connector (1) to lift the right side of the system board until it rests at an angle.
3.
Release the system board (2) by sliding it to the right at an angle until the connectors on the left side
4.
of the system board disengage from the base enclosure.
Remove the system board (3).
5.
If it is necessary to replace the modem module cable, remove the RJ-11 connector (1) from the clip
6.
built into the base enclosure.
86 Chapter 4 Removal and replacement procedures