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Removal and replacement procedures 4–33

Fan

Before removing the fan, 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 4-7).

5. Remove the following components:

a. Hard drive (see “Hard drive” on page 4-8)

b. Memory module (see “Memory module” on page 4-10)

c. WLAN module (see “WLAN module” on page 4-12)

d. Optical drive (see “Optical drive” on page 4-16)

e. Keyboard (see “Keyboard” on page 4-18)

f. Top cover (see “Top cover” on page 4-21)

Remove the fan:

1. Disconnect the fan cable 1 from the system board.

2. Loosen the captive Phillips PM2.0×7.0 screw 2 that secures the fan to the base enclosure, and then remove the

fan 3 from the heat sink.

Reverse this procedure to install the fan.

✎

To properly ventilate the computer, allow at least a 7.6-cm (3-inch) 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 affected by high external

temperatures, system power consumption, power management/battery conservation configurations, battery fast

charging, and software requirements. Exhaust air is displaced through the ventilation grill located on the left side of

the computer.

Description Spare part number

Fan 493269-001

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