RTC battery
Description Spare part number
RTC battery (includes cable and double-sided adhesive) 651948-001
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 32), and then remove the following components:
a. Service door (see
Service door on page 33)
b. Hard drive (see
Hard drive on page 34)
c. Optical drive (see
Optical drive on page 36)
d. Keyboard (see
Keyboard on page 45)
e. Base enclosure (see
Base enclosure on page 55)
f. USB board (see
USB board on page 64)
g. System board (see
System board on page 69)
Remove the RTC battery:
1. Turn the top cover upside down, with the front toward you.
2. Disconnect the RTC battery cable (1) from the system board.
Component replacement procedures 73