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Thread: I Killed My New System

  1. #1
    Jon
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    Default I Killed My New System

    Made the mistake of tie wrapping cables while powered up. The machine cut off and all attempts to resurrect it have failed.

    Found that computer shuts down within a milisecond/immediately with the 6 Pin 12V ATX cable connected to the motherboard.

    This is with one exception. If I pull the CPU it powers up and does not trip off line.

    So I guess I am wondering what is dead.

    1. Motherboard
    2. CPU
    3. Both

  2. #2
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    Default

    so, when you pull the CPU out the system the motherboard will power up, but if you put it in it wont power up?
    What?

  3. #3
    OC Jedi Master

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    Default

    That's weird, normally it would be the other way around. My guess would be motherboard.

    I'm assuming you powered off the computer, unplugged the cable, then hit the Power button. This will discharge all power.

    Reset your BIOS/clear CMOS.

    Plug power cord back in, power on.


    Work?

  4. #4
    OC Jedi Master

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    Default

    Quote Originally Posted by Jon View Post
    Made the mistake of tie wrapping cables while powered up. The machine cut off and all attempts to resurrect it have failed.

    Found that computer shuts down within a milisecond/immediately with the 6 Pin 12V ATX cable connected to the motherboard.

    This is with one exception. If I pull the CPU it powers up and does not trip off line.

    So I guess I am wondering what is dead.

    1. Motherboard
    2. CPU
    3. Both
    6pin ATX cable is to power the CPU, so you pull out the CPU and the MOBO still have power, correct?
    if you I think you kill your CPU by the shorted the current while the 6pin cable pluged in.

    Well, 99% you will kill the PSU or the other components while working with power on. That the lazyness of the human, I've learned from my mistake. Never working inside the computer with power again.

  5. #5
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    Default

    Test the pins on the PSU and trouble shoot it if you got another rig to run it in to make sure that the PSU's not the problem before you end up shipping the MOBO and CPU out for 3 weeks only to get them shipped back saying that their fine.
    Happened to me once, ended up shipping out the cpu instead of mobo and the mobo ended up being the problem. I was down for about 2 months X_X. not to mention on the return ASUS got my return address wrong because the lady taking my zip code typed it wrong and ended up shipping my MOBO to the wrong side of the damn continent! >(

  6. #6
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    Default

    wow apeman you have some really bad luck. as far as the problem id say the psu is the problem but like everyone elce said troubleshoot it get yourself a multimeter and check the voltage then try another cpu then you will find your problem.

  7. #7
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    Default

    I had a system that kept doing this to me before too, i just pulled the cmos pin and it worked

  8. #8
    OC Jedi Master

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    Default

    he said, it power up if he removes the CPU then everything running. So how can it be the supply?

  9. #9
    Jon
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    Default

    It's not the Power Supply. I tested it with another with same results.

    Additional Info:

    I removed the motherboard from the case and the only things connected were the power-on button, the main ATX power cable and the 8 pin 12V ATX (not 6 pin, my error) and the CPU.

    It trips immediately in this config.

    Then I removed the 12V ATX and it stayed powered up.
    Reconnected the 12 ATX cable and pulled the CPU and it powered up.

    I will pull the CMOS battery. Maybe I will get lucky.

    BTW, I have already ordered a new E8500 and another GiG X48T and they are on the way as I write. I did not bother with RMA cause it was clearly my screw-up. I did write Gigabyte support and posed this same question to tech support. (I bet they don't respond).

    What concerns me is using a new part along with a component that seems to be shorting the system and risk damaging something else.

  10. #10
    OC Jedi Master

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    Default

    Ouchh!...that's an expensive lesson to learn.
    I guess the only way left to figure it out when the new parts arrived by test the new CPU to see if it's work with the old board or not. Then you will know which one shorted.

    Look on the bright side, if clear Cmos work then you will have two rigs

  11. #11
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    Default

    Any chance you can try the old CPU in another rig first?

  12. #12
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    Default

    Id go along with Rosco i wouldnt want to risk trying a new Cpu in a mobo which may be faullty. Try it in a mobo you know works ok if possible. Or just wait for new parts them RMA the suspected faulty parts you might get lucky.

  13. #13
    Jon
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    Default

    I measured backplane voltages with the 12V ATX on and CPU installed. All legs read ZERO Volts.

    Then measured Voltages with CPU pulled. All 4 12 Volt outputs were now GOOD.

    Also, with power disconnected and with CPU installed & 12V ATX connected I checked for a a grounded 12v leg on the outputs of the 12V ATX connector, but all read open. No smoking gun there.

    And yes I would like to put this suspect CPU in another system. I know 1 other guy with a compatible motherboard but I wouldn't dare ask. If the concensus is that a shorting CPU will not kill the new motherboard then I will try it on my new one in transit. I am waiting for Gigabyte to answer this point but not holding my breath.

    Also the question was posed 'did I remove CPU with power on'. My honest answer is I don't think so.

    I have not pulled the CMOS battery yet either. I will try it after work this PM. I'm not optimistic given that it powers down in the blink of an eye.

  14. #14
    Jon
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    Default

    As suggested, tried removing CMOS battery & powered up. No change. Powers cuts off instantly with CPU installed. I will post again when I have determined for sure what I fried.

  15. #15
    OC Jedi Master

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    Default

    That sucks man, good luck.

  16. #16
    Jon
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    Default Resolved?

    The CPU checks good on another system. I am concluding the motherboard is shorting out the 12V ATX outputs. Since I have already ordered another Motherboard & CPU this leaves me with a spare Wolfdale, I suppose I will build another rig around the extra E8500 with a BlackOps.

    Looking to water-cool this time. Any suggestions on water cooling kits? I am looking to cool both
    CPU and Northbridge and a single card dual core GPU. Thanks to all who took the time to assist.

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