HP Apollo 2000 System Maintenance And Service Manual page 92

CAUTION:
Heatsink retaining screws should be tightened in diagonally opposite pairs (in an "X" pattern).
3. Install the heatsink:
a. Position the heatsink on the processor backplate.
b. Tighten one pair of diagonally opposite screws halfway, and then tighten the other pair of screws.
c. Finish the installation by completely tightening the screws in the same sequence.
4. Install the air baffle.
5. Install any removed PCI riser cage assemblies.
6. Install the node into the chassis.
7. Connect all peripheral cables to the node .
8. Power up the node .
92 Removal and replacement procedures