Heat sink
All heat sink spare part kits include replacement thermal material.
Description Spare part number
Heat sink for use in computers with discrete graphics 654310-001
Heat sink for use in computers with UMA graphics 654311-001
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 41).
5. Remove the following components:
a. Bottom door (see
Bottom door on page 43).
b. Hard drive (see
Hard drive on page 46)
c. Optical drive (see
Optical drive on page 44)
d. WLAN module (see
WLAN/Bluetooth combo card on page 52)
e. WWAN module (see
WWAN module on page 50)
f. Fan (see
Fan on page 81)
g. Heat sink (see
Heat sink on page 83)
h. Keyboard (see
Keyboard on page 57)
i. Top cover (see
Top cover on page 59)
j. System board (see
System board on page 76)
k. Fan (see
Fan on page 81)
Remove the heat sink:
1. Position the system board upright.
2. To remove the UMA heat sink, in the order indicated, loosen the four captive Phillips screws (1)
— (4) that secure the heat sink to the system board.
Component replacement procedures 83
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