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RTC battery
Description Spare part number
RTC battery 637193-001
Before removing the RTC battery, follow these steps:
1. Shut down the computer.
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 33).
5. Remove the service door (see
Service door on page 34).
6. Remove the optical drive (see
Optical drive on page 35).
7.
Remove the hard drive (see
Hard drive on page 38).
8. Remove the keyboard (see
Keyboard on page 45).
9. Remove the top cover (see
Top cover on page 48).
10. Remove the system board (see
System board on page 68).
Remove the RTC battery:
1. Turn the system board upside down, with the front toward you.
2. Disconnect the RTC battery cable (1) from the system board.
3. Remove the RTC battery (2) from the system board. (The RTC battery is attached to the system
board with double-sided tape.)
70 Chapter 4 Removal and replacement procedures ENWW