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PCH heat sink
NOTE: The post controller hub (PCH) heat sink spare part kit includes replacement thermal material.
Replacement thermal material is also available in the Thermal Material Kit, spare part number
719864-001.
Description Spare part number
PCH heat sink 719863-001
Before removing the PCH heat sink, 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 46), and then remove the following components:
a. Optical drive (see
Optical drive on page 47)
b. Hard drive (see
Hard drive on page 49)
c. WLAN module (see
WLAN module on page 51)
d. Keyboard (see
Keyboard on page 56)
e. Top cover (see
Top cover on page 60)
f. System board (see
System board on page 74)
Remove the PCH heat sink:
1. Following the 1 through 2 sequence stamped into the PCH heat sink, loosen the two captive
Phillips screws (1) that secure the PCH heat sink to the system board.
Component replacement procedures
87