HP EliteDesk 800 G3 Maintenance And Service Manual page 52

5. Remove the fan duct.
6. In the order indicated on the heat sink, loosen the three captive Torx screws.
CAUTION:
sink.
CAUTION:
on the surface of the processor or the heat sink.
44 Chapter 4 Removal and replacement procedures – desktop mini (DM) chassis
Be sure the loosen the screws in the order indicated by the numbers stamped on the heat
To reduce a degradation in thermal performance, be sure not to touch the thermal grease