Remove the RTC battery:
1. Turn the system board upside down with the front toward you.
2. Use a plastic flat-bladed tool (1) to release the RTC battery (2) from the socket on the
system board.
Reverse this procedure to install the RTC battery. When installing the RTC battery in the system board
socket, make sure the “+” is facing up.
Power connector cable
Description Spare part number
Power connector cable 758054-001
Before removing the power connector cable, 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 52), and then remove the following components:
a. Service cover (see
Service cover on page 53)
b. Hard drive (see
Hard drive on page 54)
c. Optical drive (see
Optical drive on page 62)
92 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts