HP Compaq Presario,Presario V4000 Maintenance And Service Manual page 126

Removal and Replacement Procedures
✎
The following screws should be removed and installed in the
1, 2, 3, 4 sequence stamped on the heat sink.
5. Remove the four Phillips PM2.0×12.0 spring-loaded shoulder
screws 1 that secure the heat sink to the computer.
✎
Due to the adhesive quality of the thermal paste located
between the heat sink and processor, it may be necessary to
move the heat sink from side to side to detach the heat sink
from the processor.
6. Remove the heat sink 2.
Removing the Heat Sink
5–22 Maintenance and Service Guide