HP zx6000 Processor Upgrade Instructions page 8

8. Insert the special processor tool into the processor locking
mechanism, and unlock the mechanism.
The hole runs down through the edge of the turbo fan
heatsink. Rotate the special processor tool 180 degrees
counterclockwise.
1
Unlocking the Processor Locking Mechanism
1 Insert special processor tool here
2
The special processor tool rotates
this lock underneath the heat sink
3
Unlocked
4
Locked
2 3 4