HP Compaq nc8430 Maintenance And Service Manual page 119

✎
The following screws should be loosened and installed in the
1, 2, 3, 4 sequence stamped on the heat sink.
4. Loosen the four Phillips PM2.5×8.0 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.
5. Lift the right side of the heat sink 2 until it disengages from
the processor.
6. Slide the heat sink 3 to the right and remove it.
Removing the Heat Sink
Maintenance and Service Guide
Removal and Replacement Procedures
5–29