Jumper; Clear Cmos Jumper: J2 - MSI MEGA 651 User Manual

2.7 Jumper

There is a CMOS RAM on board that has a power supply from external
battery to keep the data of system configuration. With the CMOS RAM, the sys-
tem can automatically boot OS every time it is turned on. That battery has long
life time for at least 5 years. If you want to clear the system configuration, use the
JBAT1 (Clear CMOS Jumper ) to clear data. Follow the instructions below to clear
the data:

Clear CMOS Jumper: J2

You can clear CMOS by shorting 2-3 pin while the
system is off. Then return to 1-2 pin position. Avoid
clearing the CMOS while the system is on; it will dam-
age the mainboard.
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1
3
Clear Data
Keep Data
Introducing Mainboard
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3
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