Maintenance and Service Guide

RTC battery
Description Spare part number
RTC battery (includes cable and double-sided adhesive) not spared
Before removing the RTC battery, follow these steps:
1. Turn o the computer. If you are unsure whether the computer is o 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 bottom cover (see Bottom cover on page 33).
5. Remove the battery (see Battery on page 35).
6. Remove the system board (see System board on page 59).
Remove the RTC battery:
1. Position the system board upside down.
2. Disconnect the cable (1) from the system board.
3. Lift the battery to detach it from the adhesive on the system board (2).
Reverse this procedure to install the RTC battery.
Component replacement procedures 63