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RTC battery
Description Spare part number
RTC battery 602745-001
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 43).
5. Remove the following components:
a. Hard drive (see
Hard drive on page 44)
b. WLAN (see
WLAN module on page 49)
c. Optical drive (see
Optical drive on page 47)
d. Keyboard (see
Keyboard on page 53)
e. Top cover (see
Top cover on page 55)
f. Speaker assembly (see
Speaker assembly on page 58)
g. Display assembly (see
Display assembly on page 66)
h. System board (see
System board on page 73)
Remove the RTC battery:
1. Turn the system board upside down.
2. Release the RTC battery from the clips on the system board (1).
78 Chapter 4 Removal and replacement procedures