RTC battery
Description Spare part number
RTC battery
616073-001
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 55).
5. Remove the switch cover and keyboard (see 
Switch cover and keyboard on page 56).
6.
Remove the optical drive (see 
Optical drive on page 61).
7. Remove the power button board cable (see 
Power button board on page 63).
8. Remove the speakers (see 
Speakers on page 65).
9. Remove the thermal shield (see 
Thermal shield on page 67).
10. Remove the display assembly (see 
Display assembly on computers with 17.3-in displays
on page 89 or Display assembly on computers with 15.6-in displays on page 96).
11. Remove the palm rest (see 
Palm rest on page 84).
12. Remove the hard drive (see 
Hard drive on page 87).
13. Remove the top cover (see 
Top cover on page 103).
Remove the RTC battery:
1. Position the computer right-side up with the front toward you.
Component replacement procedures
107
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