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RTC battery
Description Spare part number
RTC battery 686274-001
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 34).
5. Remove the memory module/wireless module compartment cover (see
Memory module
on page 35).
6. Remove the hard drive compartment cover (see
Hard drive on page 44).
Remove the RTC battery:
1. Use a flat-bladed, non-metallic tool (1) to release the RTC battery from the socket on the
system board.
2. Remove the RTC battery (2).
Component replacement procedures
47