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 30), and then remove the following components:
a. Service cover (see Service cover on page 31)
b. Hard drive (see Hard drive on page 32)
c. Optical drive (see Optical drive on page 37)
d. Keyboard (see Keyboard on page 39)
e. Top cover (see Top cover on page 42)
f. Speakers (see Speakers on page 50)
g. System board (see System board on page 53)
Remove the RTC battery:
1. Turn the system board upside down with the front toward you.
2. Use a plastic flat-bladed tool (1) to release the RTC battery (2) from the socket on the system board.
Reverse this procedure to install the RTC battery. When installing the RTC battery in the system board socket,
make sure the “+” is facing up.
62 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts
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