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RTC battery
NOTE: Removing the RTC battery and leaving it uninstalled for 5 or more minutes causes all passwords
and CMOS settings to be cleared.
Description Spare part number
RTC battery 438556-001
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 32).
5.
Remove the following components:
a.
Hard drive (see
Hard drive on page 33)
b.
Memory/WLAN module compartment cover (see
Memory module on page 35)
c.
Optical drive (see
Optical drive on page 39)
d.
Switch cover (see
Switch cover on page 41)
e.
Keyboard (see
Keyboard on page 43)
f.
Display assembly (see
Display assembly on page 47)
g.
Base enclosure (see
Base enclosure on page 52)
Remove the RTC battery:
▲
Use a non-conductive, flat-bladed tool to pry the RTC battery out of the socket.
54 Chapter 4 Removal and replacement procedures