Heat sink
The heat sink is secured with four captive Torx screws, four captive Phillips #1 screws, and one non-captive
Torx screw.
To remove the heat sink:
1. Prepare the computer for disassembly (see
Preparing to disassemble the computer on page 25).
2. Remove the rear covers (see
Removing the rear covers from the computer on page 26).
3. Separate the computer from the column (see
Separating the computer from the column on page 35).
4. Remove the system board cover (see
System board cover on page 47).
5. In the order indicated on the heat sink, loosen the four captive Torx screws (1) – (4) from the larger part
of the heat sink over the processor.
CAUTION: Remove heat sink retaining screws 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. In the order indicated on the heat sink, loosen the four captive Phillips #1 screws (1) – (4) from the
smaller part of the heat sink over the graphics chip.
CAUTION: Remove heat sink retaining screws 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.
7. Remove the Torx screw on the right part of the heat sink (5) above the fan.
60 Chapter 4 Removal and Replacement Procedures – Computer ENWW
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