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  1. #1
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    Default Tap the PC, it turns off

    Today, I pulled my machine out to swap some cables (while it was still live). It turned itself off. I thought it was just the power cable and replaced it. Turned the machine of, tapped it and it shut itself off again.

    Opened the case, checked all the connections and stuff and it all looked in order. Turned the PC on, tapped it on the top and it went off again (sometimes with a high pitched whine).

    I have heard 2 possible explanations..
    * loose cord in the Power Supply
    * loose screw under the motherboard that might be shorting it out

    Any other ideas/suggestions would be appreciated.

  2. #2
    Computer "Specialist" Agent_24's Avatar
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    Default Re: Tap the PC, it turns off

    When you say live, do you mean turned on and running or just plugged in? and what cables did you pull out?
    Non-system disk or disk error. Replace and strike any key when ready.

  3. #3
    Senior Member pctek's Avatar
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    Default Re: Tap the PC, it turns off

    If you mean by live, it was running then you've probably damaged something.
    Like the PSU. Try another one it it.

  4. #4
    Pedant and proud of it
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    Default Re: Tap the PC, it turns off

    If it whines before shutting down, the power supply is probably being overloaded, and shutting itself down. A PSU can stand abuse better than most other components.

    Check that the cables "replaced" are the right way round.

  5. #5
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    Default Re: Tap the PC, it turns off

    I was only swapping speaker cables around.

    The cables that I replaced were the external power ones and they only go in 1 direction. Everything else looks fine.

    It's a 550w power supply - it shouldn't have problems with all my stuff.

    I'm getting a second opinion tonight and then I'll take it in.

  6. #6
    Computer "Specialist" Agent_24's Avatar
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    Default Re: Tap the PC, it turns off

    maybe it's your speakers that are whining?
    Non-system disk or disk error. Replace and strike any key when ready.

  7. #7
    Senior Member pctek's Avatar
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    Default Re: Tap the PC, it turns off

    Quote Originally Posted by matthew-h
    I was only swapping speaker cables around.

    The cables that I replaced were the external power ones and they only go in 1 direction. Everything else looks fine.

    It's a 550w power supply - it shouldn't have problems with all my stuff.

    I'm getting a second opinion tonight and then I'll take it in.
    550ws can still be damaged. I'd check it out, after all its providing power to evrything in the case - I'd be paranoid.

  8. #8
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    Default Re: Tap the PC, it turns off

    I might do that...if it is, it'll be the second PSU I've been through...

  9. #9
    asdfasdf
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    Default Re: Tap the PC, it turns off

    Erm, check the power on switch lead - it may be dangling exposed near the case, require a tap to close the circuit and trigger the switch

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