Reset Bios Cmos Battery. Other settings like boot order etc will be returned to defaults though when you remove the CMOS battery. How to enter the BIOS or CMOS setup.

If it has no battery it has a real time clock where a large capacitor keeps it going between charges. The system remains powered on no bootlooping. I had not even set a password.
Download the mother board manual by name and model.
Back to default can be usually done by jumper setting on main board or removing the cmos battery and then replacing teh cmos battery after a few minutes for the cmos to lose its settings and default to default. Adjust your BIOS options as necessary. Probably has a jumper that you can remove to reset the bios to orignial state. Moving the CMOS jumper to the reset position failed to remedy this problem as well as completely removingreplacing the battery in its socket.

