HP Compaq NC6140 Maintenance And Service Manual page 116

Removal and Replacement Procedures
4. Loosen the four Phillips PM2.0×8.0 shoulder screws 1 that
secure the heat sink to the computer.
5. Lift the right side of the heat sink 2 to disengage it from the
processor.
6. Slide the heat sink 3 to the right to remove it.
✎
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.
Removing the Heat Sink
Reverse the above procedure to install the heat sink.
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