3. Remove the RTC battery (2).
Reverse this procedure to install the RTC battery. When installing the RTC battery, make sure the “+” sign
faces up.
Fan
Description Spare part number
Fan 765788-001
NOTE: To properly ventilate the computer, allow at least 7.6 cm (3 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 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.
Before removing the fan, follow these steps:
1. Turn off 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 the power from the computer by unplugging the power cord from the computer.
3. Disconnect all external devices from the computer.
4. Remove the battery (see
Battery on page 29), and then remove the following components:
a. Service door (see
Service door on page 30)
b. Optical drive (see
Optical drive on page 32)
52 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts
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