It should not cause a hardware or permanent damage to a main board when some BIOS settings were changed from default to over clocking or non-standard status. We suggest the following three troubleshooting methods to discharge CMOS data and recover the hardware default status. It will make the main board working again and please don't bother returning the main board to where you bought it or go through an RMA process.

1. Switch off the power supply unit and then switch it on again after one minute. If there isn't a switch on it, pull off the power cord for one minute and then pull it back. Press the "Insert" key on the keyboard and don't loosen it, meanwhile, press the power-on button to boot up system. If it works, loosen the "Insert" key and hit "Del" key to enter the BIOS setup page to do correct settings. If still can't help, repeat step 1 three times or try step 2.
2. Switch off the power supply unit or pull off the power cord, and then open the chassis. There is a CCMOS jumper near the battery. Change the jumper position from default 1-2 (Figure.1) to 2-3 (Figure.2) for one minute to discharge the CMOS data, and then put it back to default 1-2 (Figure.1). Close the chassis and switch on the power supply unit or pull in the power cord. Press the power-on button to boot up system. If it works, hit "Del" key to enter the BIOS setup page to do correct settings. If still can't help, try step 3.
   The demo board is BD7-II
3. The same procedure as step 2, meanwhile, pull up ATX power connectors from main board and take away main board battery during CMOS discharging.