Heat sink
1. Prepare the computer for disassembly (Preparation for Disassembly on page 32).
2. Remove the access panel (
Access Panel on page 32).
3. Remove the baffle (
Baffle on page 67).
4. Remove the front fan assembly (
Front Fan Assembly on page 68).
5. Loosen the four captive screws that secure the heat sink to the system board tray.
CAUTION: Heat sink retaining screws should be removed in diagonally opposite pairs (as in
an X) to even the downward forces on the processor. This is especially important as the pins on
the socket are very fragile and any damage to them may require replacing the system board.
6. Lift the heat sink from atop the processor and set it on its side to keep from contaminating the
work area with thermal grease.
Figure 5-51 Removing the heat sink
When reinstalling the heat sink, make sure that its bottom has been cleaned with an alcohol wipe and
fresh thermal grease has been applied to the top of the processor.
CAUTION: Heat sink retaining screws should be tightened in diagonally opposite pairs (as in an X)
to evenly seat the heat sink on the processor to avoid damage that could require replacing the system
board.
Failure to install the fan shroud may cause the computer to overheat.
72 Chapter 5 Removal and Replacement Procedures
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