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Thread: PC won't boot. Is my CPU dead?

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    PC won't boot. Is my CPU dead?

    I've been having an absolute nightmare with a recent upgrade I did. Ever since I installed a new GPU and cooler my rig has not been the same. It worked for about 8 hours after the upgrade but then it refused to boot. I can't even get into BIOS. I have tried every form of troubleshooting there is (including resetting CMOS). None of it has worked. I have also tried switching out the GPU, the RAM, the PSU and the cooler. None of that worked either.

    Can I safely say that the CPU is dead or will I possibly be just wasting even more money (I've already spent nearly £100 on a second PSU and sticks of RAM)?

    Any help whatsoever is appreciated. I'm at the end of my tether with this

  2. #2
    Pancake
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    Re: PC won't boot. Is my CPU dead?

    What board is it? and what CPU?

    A CPU doesn't die very often (No pun intended), so its got more chance of being the board

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    Re: PC won't boot. Is my CPU dead?

    It's an EVGA 780i FTW mobo and a Q6600 G0 CPU. Neither has ever been overclocked.

    I'm using the board EVGA RMA'd me this week. Same error on both mobos.

  4. #4
    Pancake
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    Re: PC won't boot. Is my CPU dead?

    Does it show a post code? if it has an LCD poster

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    Re: PC won't boot. Is my CPU dead?

    It's an 'instant FF' error. FF means fully functioning usually but not in my case, unfortunately.

  6. #6
    Pancake
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    Re: PC won't boot. Is my CPU dead?

    If it were mine i would blame the board, i would bet £100 on it

    Maybe see if you can get a used Core2Duo from someone to test the board?

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    Re: PC won't boot. Is my CPU dead?

    But how likely is it that EVGA will have sent me out a dud board which throws up the exact same error? Quite long odds I would have thought.

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    • Behemoth's system
      • Motherboard:
      • Gigabyte mATX
      • CPU:
      • Phenom 2 X2 555 BE
      • Memory:
      • 8 Gig DDR3 Corsair XMS 3 1600 MHz
      • Storage:
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      • Graphics card(s):
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      • PSU:
      • OCZ StealthStream 2 600 Watt
      • Case:
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    Re: PC won't boot. Is my CPU dead?

    It does happen sadly, it's been known to happen before. You got another GFX card you can try ? Rule that out before you send the board away again for another lengthy RMA process. I think I'd be inclined to strip the system down to nothing and go ghetto.

    Only run a min of what the system needs to start so RAM and GFX card, then slowly add parts till you find the weak link.

    I take the board is taking power and the PSU spins up ?

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    Re: PC won't boot. Is my CPU dead?

    Yeah I've tried multiple GPUs. Also tried going with a minimal configuration. Board takes power, PSU is working, all the fans spin, etc.

  10. #10
    Senior Member Betty_Swallocks's Avatar
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    • Betty_Swallocks's system
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    Re: PC won't boot. Is my CPU dead?

    Have you swapped out the RAM for a known good bit?
    "Free speech includes not only the inoffensive but the irritating, the contentious, the eccentric, the heretical, the unwelcome and the provocative provided it does not tend to provoke violence. Freedom only to speak inoffensively is not worth having."

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    Re: PC won't boot. Is my CPU dead?

    Quote Originally Posted by Betty_Swallocks View Post
    Have you swapped out the RAM for a known good bit?
    Yep. Bought new ram just to test. Also tried every possible ram configuration. Apparently the red light indicates a PSU or CPU failure and given that I've now tried two different PSUs it's looking more and more likely that it's a dead CPU, which is a bit annoying, but oh well...

    On the lookout for a used Q6600 G0

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    Re: PC won't boot. Is my CPU dead?

    Hmmm. Warning messages are sometimes a bit misleading. I had a message that indicated CPU or PSU. Both that CPU and PSU are currently working just fine .... in another motherboard. I'm not suggesting that's the case here .... just sayin'.

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