HP ProOne 400 G1 Maintenance & Service Manual page 83

6. In the order indicated on the heat sink, loosen the four captive Torx screws (2), and then lift the
heat sink out of the computer.
CAUTION:
Be sure the loosen the screws in the order indicated by the numbers stamped on the
heat sink.
CAUTION: To reduce a degradation in thermal performance, be sure not to touch the thermal
grease on the surface of the processor or the heat sink.
To replace the heat sink, reverse the removal procedures.
Heat sink
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