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PC wont boot when 8 pin CPU connector connected

Hi,
Had my PC running for years and all of a sudden it shut down and I smelt some burning. PC would no longer post the Mobo lights would go on for a split second and then die. Burning smell was gone. PC has a 750 watt psu with an ASUS p67 mobo and i72600k cpu. I thought it might be the PSU so I tried another one also disconnected all other hardware IE Vid card sound card and HD but same problem. I then disconnected the CPU 8 pin connector from the mobo and it seems to at least turn on. Fans run and the CPU red LED comes up on the mobo. As soon as I connect back the 8 pin connector same issue. I measured the voltage on the connector unplugged im definitly getting 12 volt on each pin. However when I connect the 8 pin back and just leave the PSU on I found there is not voltage at the solder points for the 8pin behind the motherboard.

What I am trying to figure out is if it looks like the connector might be bad. If not is it the motherboard or CPU. Again the CPU led comes on when the 8 pin connector is not in not sure if they confirms the CPU is good.
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  1. Best answer
    Ooo burning smells are never good. I would take out the motherboard and check it throughly. Sounds like it might be an issue with the motherboard. Look for any burnt spots or anything that looks fried or any Popped Capacitors.
  2. What is the PSU brand?
  3. PSU is a cougar 750 watt. Bought another motherboard an evga p67 ftw still wont post. FTW has a debug display but im getting different errors each time. If I remove the ram from the board I get some beeps which would mean the CPU is fine but then ill restart and no beep. I guess its the CPU???
  4. Anile8er said:
    PSU is a cougar 750 watt. Bought another motherboard an evga p67 ftw still wont post. FTW has a debug display but im getting different errors each time. If I remove the ram from the board I get some beeps which would mean the CPU is fine but then ill restart and no beep. I guess its the CPU???


    Check with your motherboard manual or manufacturer website to see what the beep codes mean. It sounds like some parts of your computer are still operating, while others aren't.
  5. Found someone with another CPU. Motherboard and CPU blew bad luck I guess. Thanks guys
  6. So is the problem solved? Or do you still need help?
  7. Yup resolved need a new mobo and cpu!
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