CPU heatsink
Prerequisite
Before you start, read Generic Safety and Compliance Notices, and print the following instructions.
CAUTION:
Avoid contact with hot components inside the computer. During operation, some components
become hot enough to burn the skin. Before you open the computer cover, turn off the computer,
disconnect power, and wait approximately 10 minutes for the components to cool.
For access, do the following:
1. Remove the side panel. See “Side panel” on page 61.
2. Remove the CPU duct. See “CPU duct” on page 66.
3. Disconnect the CPU heatsink cable from the microprocessor fan connector on the system board. See
“System board” on page 54..
Removal steps
Loosen the four screws that secure the CPU heatsink to the system board in diagonal sequence and unlock
the anti-tilt wires in the same sequence to lift the CPU heatsink. For example,
1. Partially remove screw
1a , then fully remove screw 1b , and then fully remove screw 1a .
2. Partially remove screw
1c , then fully remove screw 1d , and then fully remove screw 1c .
Notes:
• Use T30 screw bit with torque 10 ± 1 in-lb to loosen the four screws of CPU heatsink.
• The four screws cannot be removed from the CPU heatsink.
• Place the CPU heatsink on its side. Ensure that the thermal grease on the bottom of it does not get in
contact with anything.
Chapter 7. Hardware removal and installation 97
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