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What to do next:
• To work with another piece of hardware, go to the appropriate section.
• To complete the installation or replacement, go to "Completing the parts replacement" on page 100.
Heat sink and fan assembly
Attention: Do not open your computer or attempt any repair before reading and understanding the "Read
this first: Important safety information" on page iii.
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.
To replace the heat sink and fan assembly, do the following:
1. Prepare your computer. See "Preparing your computer and removing the computer cover" on page 57.
2. Lay the computer on its side for easier access to the system board.
3. Locate the heat sink and fan assembly. See "Computer components" on page 5.
4. Disconnect the heat sink and fan assembly cable from the microprocessor fan connector on the system
board. See "Parts on the system board" on page 5.
5. Follow the following sequence to remove the four screws that secure the heat sink and fan assembly to
the system board:
a. Partially remove screw
b. Partially remove screw
Note: Carefully remove the four screws to avoid any possible damage to the system board. The four
screws cannot be removed from the heat sink and fan assembly.
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P320 User Guide
1
, then fully remove screw
3
, then fully remove screw
2
, and then fully remove screw
4
, and then fully remove screw
1
.
3
.
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