9. Remove the system board (4).
Reverse this procedure to install the system board.
Fan/heat sink assembly
Description Spare part number
Fan/heat sink assembly (includes replacement thermal material) 801798-001
Before removing the fan/heat sink assembly, follow these steps:
1. Turn off the computer. If you are unsure whether the computer is off or in Hibernation, turn
the computer on, and then shut it down through the operating system.
2. Disconnect the power from the computer by unplugging the power cord from the computer.
3. Disconnect all external devices from the computer.
4. Remove the battery (see Battery on page 29), and then remove the following components:
a. Service cover (see Service cover on page 30)
b. Keyboard (see Keyboard on page 41)
c. Bottom cover (see Bottom cover on page 44)
d. System board (see System board on page 50)
Remove the fan/heat sink assembly:
1. Disconnect the fan cable (1) from the system board.
2. Following the 1, 2, 3, 4 sequence stamped into the fan/heat sink assembly, loosen the four captive
Phillips PM2.0×6.5 screws (2) that secure the fan/heat sink assembly to the system board.
Component replacement procedures 53
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