4. Place the CPU heatsink on top of the processor and align the four mounting screws with the
holes 1 in the system board.
NOTE: If both CPU heatsinks were removed, be sure all system board standoffs engage with the
keyholes in the chassis, be sure the system board connectors engage correctly with the rear I/O
panel, and push back on the system board while engaging the CPU heatsink screws with the
chassis standoffs. You only must push back when trying to engage the first screw.
Figure 4-46 Replacing the CPU heatsink on the system board
5. Tighten the four CPU heatsink screws. First, tighten all of the screws partially so that the CPU
heatsink remains level. Next, fully tighten one pair of diagonally opposite screws 1 and fully tighten
the remaining pair 2. Tighten firmly to a torque setting of 6 in-lb.
Figure 4-47 Identifying proper screw tightening sequence
ENWW Removal and replacement of components 93
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