HP EliteOne 705 G2 Maintenance & Service Manual page 70

8. Lift the heat sink out of the computer.
CAUTION:
on the surface of the processor or the heat sink.
NOTE:
UMA models:
Discrete models:
To replace the heat sink, reverse the removal procedures.
60 Chapter 4 Removal and Replacement Procedures
To reduce a degradation in thermal performance, be sure not to touch the thermal grease
Heat sink appearance may vary.