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Chapter: Connectors
Jumper Settings
3.5 Jumper Settings
3.5.1 Clear CMOS
In case the board doesn't start up anymore and BIOS setup is inaccessible there is a "last resort": You can
use the "Clear CMOS" jumper to reset all CMOS settings to factory defaults. In order to do so you need to
shut down the computer, change the jumper setting from normal (pins 1 & 2 short) to "Clear CMOS" (pins 2
& 3 short), wait a few seconds, put the jumper back into normal position and reboot.
C
AUTION
If you reset the CMOS this does not only bring all settings made in BIOS setup back to default values, it also
clears the date and time information stored in CMOS. So don't forget that, after the Clear CMOS procedure,
you will have to set the clock again.
page 46
Beckhoff New Automation Technology CB1050
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