christopher789 :
i have intel motherboard DZ68DB when i update bios while updateing bios suddenly pc off and when i run our pc shows no display and all fan run in fully speed and again i plug off pc and put out ram pc shows no beep how i can set mobo default setting
You can try this method from this
link
To restore the bios settings of the intel DZ68DB mother board follow the steps.
1. Turn off the computer.
2. Change the BIOS jumper configuration by moving the pins of the jumper from 1&2 to 2&3
3. Turn on the computer.
4. The system should be displaying the splash screen and will go into the BIOS configuration automatically.
5. Change the IDG Primary Video Port to Auto.
6. Change the Primary Video Adapter to Auto.
7. Exit form BIOS. The system will prompt you to power down the system and return the BIOS configuration jumper to RUN.
8. The system should now start normally with the BIOS screen showing when the system starts.
If this does not work then the BIOS chip is most likely fried and you need to repair or replace the motherboard.