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3 clear cmos jumper: clr_cmos1, Clear cmos jumper: clr_cmos1 – Intel AIMB-253 User Manual

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Chapter 2 Hardware Setup

2.7.3

Clear CMOS Jumper: CLR_CMOS1

There is a CMOS RAM onboard that has a power supply from 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 CLR_CMOS1 (Clear
CMOS Jumper ) to clear data.

Note

You can clear CMOS by shorting 1-2 pin while the system is
off. Then return to 2-3 pin position. Avoid clearing the CMOS
while the system is on; it will damage the mainboard.

CLR_CMOS1

1

Keep Data

1

3

Clear Data

1

3

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