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CAUTION:
The heat sink and fan assembly might be very hot. Turn off the computer and wait three
to ve minutes to let the computer cool before removing the computer cover.
To replace the heat sink and fan assembly, do the following:
1. Remove the computer cover. See “Removing the computer cover” on page 68.
2. Lay the computer on its side for easier access to the system board.
3. Locate the heat sink and fan assembly. See “Locating parts on the system board” on page 70.
4. Disconnect the heat sink and fan assembly cable from the microprocessor fan connector on the system
board. See “Locating parts on the system board” on page 70.
5. Remove the four screws 1 that secure the heat sink and fan assembly to the system board.
Note: Carefully remove the four screws from the system board to avoid any possible damage. The four
screws cannot be removed from the heat sink and fan assembly.
Figure 16. Removing the heat sink and fan assembly
6. Lift the failing heat sink and fan assembly off the system board.
Notes:
a. You might have to gently twist the heat sink and fan assembly to free it from the microprocessor.
b. Do not touch the thermal grease while handling the heat sink and fan assembly.
7. Position the new heat sink and fan assembly on the system board so that the four screws are aligned
with the holes on the system board.
Note: Position the new heat sink and fan assembly so that the heat sink and fan assembly cable is
toward the microprocessor fan connector on the system board.
Chapter 8. Replacing FRUs 79