Gigabyte GA-VM800PMC User Manual page 26

17) CLR_CMOS (Clear CMOS)
You may clear the CMOS data to its default values by this header. To clear CMOS, temporarily
short the two pins. Default doesn't include the jumper to avoid improper use of this header.
18) BATTERY
GA-VM800PMC Motherboard
Open: Normal
Short: Clear CMOS
Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type recommended
by the manufacturer.
Dispose of used batteries according to the manufacturer's
instructions.
If you want to erase CMOS...
1. Turn off the computer and unplug the power cord.
2. Gently take out the battery and put it aside for about one minute.
(Or you can use a metal object to connect the positive and
negative pins in the battery holder to make them short for five
seconds.)
3. Re-install the battery.
4. Plug the power cord in and turn on the computer.
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