Mobo Power Pins / BIOS

[techwiz1997]

I have a ASUS P8H67-M PRO mobo and it has a 8 pin connection however I plugged in my 4pin and it worked. Then I flashed the bios now the pc wont start.. It would start for around 2 seconds then shutoff and then repeat. I think its because of the lack of the other 4pin.. Is there a way to revert back to the old bios I had before so that I can continue using my psu until my new one comes?

 

[Vitric9]

It may be that the boot order or something is not correct. try the old CMOS battery reset.
There is CMOS Jumper :
a) Power off. Unplug.
b) Move the jumper cap from pins 1-2 ( default ) to pins 2-3. Keep the cap on pins 2-3 for about 5-10 seconds, then move the cap back to pins 1-2.
c) re-connect 'er to the PSU.
d) Power up and enter UEFI via Del or F2 , or F7. Enter the Values in the UEFI BIOS under Boot or Boot Priority

 

[techwiz1997]

Thanks, I was able to get it to start booting but only once, during that time I was able to flash to the second to latest bios firmware and now it work ok ish.