HP 530 Maintenance And Service Manual page 66

Lift the left side of the heat sink (3) and remove it.
3.
NOTE:
processor (1), the processor (2), and the heat sink surfaces (3) and (4) each time the heat sink is
removed. Reapply the thermal material when the heat sink is replaced. Thermal material is included
with all heat sink, processor, and system board spare part kits.
Reverse this procedure to install the heat sink.
58 Chapter 4 Removal and replacement procedures
The thermal material must be thoroughly cleaned from the surfaces of the video