Heat sink
Description Spare part number
Heat sink for use in models with on-board system memory (includes replacement thermal material) 910302-001
Heat sink for use in models with SODIMMs (includes replacement thermal material) 910158-001
Before removing the heat sink, follow these steps:
1. Turn o 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 the power from the computer by unplugging the power cord from the computer.
3. Disconnect all external devices from the computer.
4. Remove the bottom cover (see Bottom cover on page 28).
5. Disconnect the battery cable from the system board (see Battery on page 30).
Remove the heat sink:
1. Remove the four Phillips PM2.0×3.3 screws (1) that secure the heat sink to the system board.
2. Remove the heat sink (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.
50 Chapter 5 Removal and replacement procedures
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