4-10 Maintenance and Troubleshooting
CMOS Battery Replacement
Remove the 3-volt lithium battery from the system board as follows.
1. Turn off and unplug the system unit and any external options connected to
the system.
!
CAUTION
Removing the battery from the system board causes the
computer to lose system configuration information. If
possible, run Setup and record the system configuration
settings before removing the battery. Use the information to
restore the system after replacing the battery.
2. Remove the system access cover.
3. Locate the battery and its socket on the system board (see the following
figure).
Locating the Battery
A – Battery
4. Use fingers to carefully pull the battery up until it is clear to slide the battery
out of the socket.
!
WARNING
The battery can explode if it is incorrectly replaced or
improperly discarded. Use only the same type battery or an
equivalent type recommended by the manufacturer when
replacing the battery.
Lithium acts as a catalyst when exposed to water and
causes spontaneous combustion on contact. Discard used
batteries according to the manufacturer’s instructions.