Hardware Setup

Jumper

Clear CMOS Jumper: JBAT1

There is a CMOS RAM onboard that has a power supply from an external battery to keep the data of system configuration. With the CMOS RAM, the system can automatically boot OS every time it is turned on. If you want to clear the system configuration, set the jumper to clear data.

1

1

1

JBAT1

Keep Data

Clear Data

Important

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 damage the mainboard.

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Image 34
MSI H55M-E21 manual Clear Cmos Jumper JBAT1