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 23).
5. Remove the memory cover (see
Memory cover on page 24).
6. Remove the bottom cover (see
Base enclosure on page 26).
Remove the RTC battery:
1. Turn the system board upside down with the front toward you.
2. Use a plastic flat-bladed tool to release the RTC battery 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.
32 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts
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