2. Remove the fan (2).
Reverse this procedure to install the fan.
RTC battery
Description Spare part number
RTC battery (includes cable and double-sided adhesive) 718440-001
Before removing the RTC battery, 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 52), and then remove the following components:
a. Service cover (see
Service cover on page 53)
b. Hard drive (see
Hard drive on page 54)
c. Optical drive (see
Optical drive on page 62)
d. Keyboard (see
Keyboard on page 64)
e. Top cover (see
Top cover on page 67)
f. Speakers (see
Speakers on page 76)
g. System board (see
System board on page 79)
Component replacement procedures
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