Specifications

RTC battery
Description Spare part number
RTC battery 651948-001
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 39).
5. Remove the service cover (see
Service cover on page 40).
Remove the RTC battery:
▲
Disconnect the RTC battery cable from the system board (1). Use a thin, non-conductive tool to
remove the RTC battery (2) from the socket on the system board.
Reverse this procedure to install the RTC battery on computer models. When installing the RTC
battery, make sure the “+” sign faces up.
54 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts