Removal and replacement procedures
Maintenance and Service Guide 4–13
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 module compartment cover (see “Memory module” on page 4-10).
6. Remove the RTC battery.
✎
Use a non-conductive pointed tool to pry the RTC battery from the socket on the system board.
Reverse this procedure to install the RTC battery. Be sure that the RTC battery is installed with the “+” sign facing
up.
Description Spare part number
RTC battery 449729-001
