Fans
Description Spare part number
Fan for use over system processor (CPU) L20334-001
Fan for use over graphics processor (VGA) L20335-001
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 fan 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.
3. Disconnect the power from the computer by rst unplugging the power cord from the AC outlet and then
unplugging the AC adapter from the computer.
4. Remove the bottom cover (see Bottom cover on page 36).
5. Remove the battery (see Battery on page 39).
To remove the fans:
1. Remove the antenna cables from the clips on the fans (1).
2. Remove the speaker cable from the larger (CPU) fan (2).
3. Disconnect the fan cables from the system board (3).
4. Remove the two Phillips M2.0×5.0 screws (4) that secure each fan to the computer.
50 Chapter 5 Removal and replacement procedures for Authorized Service Provider parts
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