5. Remove the fan from the computer (4).
Reverse this procedure to install the fan.
Heat sink assembly
NOTE: The heat sink assembly spare part kits include replacement thermal materials.
Description Spare part number
Heat sink for use in models with Skylake-H processors with discrete graphics 833452-001
Heat sink for use in models with Skylake-H processors with UMA graphics 841234-001
Heat sink for use in models with Skylake-U processors with discrete graphics 841659-001
Heat sink for use in models with Skylake-U processors with UMA graphics 841235-001
NOTE: To properly ventilate the computer, allow at least 7.6 cm (3.0 in) of clearance on the left side of the
computer. The computer uses an electric fan for ventilation. The fan is controlled by a temperature sensor and
is designed to turn on automatically when high temperature conditions exist. These conditions are aected by
high external temperatures, system power consumption, power management/battery conservation
congurations, battery fast charging, and software requirements. Exhaust air is displaced through the
ventilation grill located on the left side of the computer.
Before removing the heat sink assembly, 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.
Component replacement procedures 49
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