RTC battery
Description Spare part number
RTC battery 616073-001
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 24), and then remove the following components:
a. Bottom cover (see Bottom cover on page 26)
b. Hard drive (see Hard drive on page 28)
c. WWAN module (see WWAN module on page 33)
d. Keyboard/top cover (see Keyboard/top cover on page 48)
e. System board (see System board on page 55)
Remove the RTC battery:
1. Turn the system board upside down with the front toward you.
2. Use a flat-bladed, non-metallic tool to release the RTC battery from the socket on the system board (1).
3. Remove the RTC battery (2).
Reverse this procedure to install the RTC battery. When installing the RTC battery, make sure the "+" sign
faces up.
60 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts
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