Heat sink
NOTE: The heat sink spare part kit includes replacement thermal material.
Description Spare part number
Heat sink (includes replacement thermal material) 828819-001
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 19), and then remove the following components:
a. Remove the battery (see Battery on page 21).
b. Remove the fan (see Fan on page 25).
c. Remove the system board (see System board on page 30).
Remove the heat sink:
1. Loosen the four captive Phillips PM2.0×2.7 screws (1) that secure the heat sink to the system board.
NOTE: Due to the adhesive quality of the thermal material located between the heat sink and system
board components, it may be necessary to move the heat sink from side to side to detach it.
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 paste is used on the processor (1) and the heat sink
section (2) that services it.
Heat sink 33
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