HP Integrity BL860C i4 User's & Service Manual page 46

CAUTION:
To prevent thermal instability and damage to the server blade, do not separate the processor
module from the processor's heatsink after they have been coupled.
6. Secure the heatsink to the processor
a. Slide both plastic locking tabs into place. (See callout 1 in the following figure).
b. Grasp and rotate the latch downward. (See callout 2 in the following figure.)
WARNING:
The heatsink locking lever can constitute a pinch hazard, keep your hands on top of the lever
during installation to avoid personal injury.
46 Optional components