we found the answer. this works for any x86 motherboard.
you can either remove the coin battery next to the BIOS or reset the CMOS data by using the jumper near the BIOS chip or by removing the BIOS coin battery. when the CMOS data is reset, the BIOS reverts to default settings.
How do you reset the BIOS?
How to reset CMOS
hope that this helps.
have a nice day,