HP Compaq Presario,Presario V5000 Maintenance And Service Manual page 147

2. Turn the system board upside down with the expansion port 2
toward you.
3. Remove the four Phillips PM2.5×7.0 screws 1 that secure
the heat sink to the system board.
4. Remove the heat sink 2.
✎
Due to the adhesive quality of the thermal paste located
between the fan assembly and processor, it may be necessary to
move the fan assembly from side to side to detach it from the
processor.
Removing the Heat Sink
Maintenance and Service Guide
Removal and Replacement Procedures
5–63