3. Remove the audio board (3) by lifting it straight up.
Reverse this procedure to install the audio board.
Fan/heat sink assembly
NOTE: All fan/heat sink assembly spare part kits include replacement thermal material.
Description Spare part number
For use only with computer models equipped with discrete graphics subsystem memory and 8.1
processors
450933-001
For use only with computer models equipped with discrete graphics subsystem memory and 7.9
processors
434986-001
For use only with computer models equipped with UMA graphics subsystem memory 446521-001
NOTE: When replacing the fan/heat sink assembly, be sure that the power button board is removed
from the defective fan/heat sink assembly and installed on the replacement fan/heat sink assembly.
See
Power button board on page 59 for power button board removal information.
NOTE: To properly ventilate the computer, allow at least a 7.6-cm (3-inch) clearance on the right side
and rear panel 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 affected by high external temperatures, system power consumption, power
management/battery conservation configurations, battery fast charging, and software applications.
Exhaust air is displaced through the ventilation grill located on the left side of the computer.
Before removing the fan/heat sink assembly, 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.
Component replacement procedures 81
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