Removal and replacement procedures
Maintenance and Service Guide 4–15
RTC battery
Before removing the RTC battery, follow these steps:
1. Shut down 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 all external devices connected to the computer.
3. Disconnect the power from the computer by first unplugging the power cord from the AC outlet, and then
unplugging the AC adapter from the computer.
4. Remove the battery (see “Battery” on page 4-6).
5. Remove the memory/wireless module compartment cover (see “WLAN module” on page 4-12).
6. Remove the WLAN module (see “WLAN module” on page 4-12).
Remove the RTC battery:
1. Turn the system board upside down, with the audio connectors toward you.
2. The RTC battery has adhesive holding it down. Lift up slightly on the battery to break the adhesion.
3. Disconnect the RTC battery cable 1 from the system board.
4. Remove the RTC battery 2 from the unit.
Reverse this procedure to install the RTC battery.
Description Spare part number
RTC battery 580845-001
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