Heat sink
Description Spare part number
Heat sink 907105-001
Before removing the heat sink, follow these steps:
1. Shut down the computer. If you are unsure whether the computer is o or in Hibernation, turn the
computer on, and then shut it down through the operating system.
2. Disconnect all external devices connected to the computer.
3. Disconnect the power from the computer by rst unplugging the power cord from the AC outlet and then
unplugging the AC adapter from the computer.
4. Remove the bottom cover (see Bottom cover on page 24).
5. Disconnect the battery cable from the system board (see Battery on page 25).
Remove the heat sink:
1. Remove the two Phillips broad head PM2.0×2.0 screws (1) that secure the heat sink to the system
board.
2. Lift the heat sink o the system board (2).
NOTE: The thermal material must be thoroughly cleaned from the surfaces of the heat sink and the system
board each time the heat sink is removed. Thermal material is used on the processor (1) and the heat sink
section (2) that services it.
30 Chapter 5 Removal and replacement procedures for Authorized Service Provider parts
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