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Heat sink
Description Spare part number
Heat sink (includes replacement thermal material and replacement thermal material cleaning kit) 492582–001
Before removing the heat sink, follow these steps:
1. Shut down 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 all external devices connected to the computer.
3. Disconnect the power from the computer by first unplugging the power cord from the AC outlet
and then unplugging the AC adapter from the computer.
4. Remove the battery (see
Battery on page 46).
5. Remove the following components:
a. Primary hard drive (see
Primary hard drive on page 55)
b. WLAN module (see
WLAN module on page 52)
c. Optical drive (see
Optical drive on page 60) or Secondary hard drive (see Secondary hard
drive on page 67)
d. Switch cover and keyboard (see
Switch cover and keyboard on page 62)
e. Display assembly (see
Display assembly on page 73)
f. Top cover (see
Top cover on page 79)
g. System board (see
System board on page 86)
Remove the heat sink:
1. Turn the system board upside down, with the front toward you.
2. Following the 1, 2, 3, 4 sequence stamped into the heat sink, loosen the four Torx8
T8M2.0×10.0 screws (1) that secure the heat sink to the system board.
94 Chapter 4 Removal and replacement procedures