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System Components 39
Replacing the battery
The battery provides power for the system real-time clock and CMOS
RAM, which holds the system configuration information.
If your battery is failing you may notice your system clock slowing down
and giving you the incorrect time. If so, open the Setup utility and write
down all the values in the menus and submenus before replacing the battery.
Replacing the battery resets the Setup utility to its default values.
1.
Restart the computer and start the Setup utility program by pressing
F
1
when you are prompted to do so.
2.
Write down the CMOS values from the Main Setup utility screen so
you can reenter them after you replace the battery. For more
information about the Setup utility program, see “BIOS Setup Utility”
on page 43
3.
Turn off the system and disconnect the power cord.
4.
Open the case, observing the “Static Electricity Precautions” on
page 2.
5.
Locate the battery on the system board (see “System board” on
page 8). The battery is circular and has the positive pole mark (+) on
the top.
6.
Using a small flat-bladed screwdriver, carefully remove the battery
from its socket on the system board.
To replace the battery
Caution!
There is a danger of
explosion if the battery is
incorrectly replaced.
Replace the battery only
with the same or equivalent
type recommended by the
manufacturer. Dispose of
used batteries according to
the manufacturer’s
instructions.