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configurations, battery fast charging, and software requirements. Exhaust air is displaced through the
ventilation grill located on the left side of the computer.
Heat sink
NOTE: The heat sink spare part kits include replacement thermal material.
Description Spare part number
For use only with computer models with discrete graphics subsystem memory 483011-001
For use only with computer models with UMA graphics subsystem memory 483012-001
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 44).
5. Remove the following.
a. Keyboard (see
Keyboard on page 58)
b. Switch cover (see
Switch cover on page 67)
c. Fan (see
Fan on page 70)
Remove the heat sink:
NOTE: Steps 1 through 5 apply only to computer models equipped with discrete graphics subsystem
memory. See steps 6 through 8 for removing the heat sink on computer models with UMA graphics
subsystem memory.
1. Following the 1, 2, 3, 4 sequence stamped into the heat sink, loosen the four Phillips PM2.5×11.0
captive screws (1) that secure the heat sink to the system board.
Component replacement procedures 71