Computer won't turn on

Discussion in 'Tech' started by ThatHideousStrength, Jan 28, 2009.

  1. ThatHideousStrength

    ThatHideousStrength Junior Member

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    I have an old motherboard that I used maybe 2 years ago. I just got a Antec PSU 350 Watt. I hooked it up, made sure it was all connected along with the power button. What it does is I see the CPU fan turn for half a second and a blue light from the powerbutton for the same amount of time. I don't hear any power up or anything. Any ideas?
  2. ThatHideousStrength

    ThatHideousStrength Junior Member

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    Weird, I unplugged the 2x2 power connector and left the big one on and it worked.
  3. ThatHideousStrength

    ThatHideousStrength Junior Member

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    Gah, wtf. It turns on but doesn't do anything. No beeps, no response on the keyboard nothing.
  4. SoulAssassin

    SoulAssassin Car Ramrod

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    Take out the RAM and power it on...no beeps is a bad motherboard which is what it sounds like.
  5. ThatHideousStrength

    ThatHideousStrength Junior Member

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    Well this sucks. I was counting on this mobo.
  6. Bran-Damage

    Bran-Damage New Member

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    are you sure that the 4 prong power hookup is plugged in on the board? I had this problem once when i did not plug that in...
  7. ThatHideousStrength

    ThatHideousStrength Junior Member

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    I have the opposite problem. I plug it in and all the fans jerk. I unplug it and it turns on...
  8. sims

    sims walls of text

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    Well it sounds like a mobo issue, but it it won't even post it can basically only be 2 things, Bad Mobo, or bad PSU.

    I'd grab a different PSU if you can (from your current computer?) and see if it fires up with that, atleast if not you know thats not the issue.
  9. ThatHideousStrength

    ThatHideousStrength Junior Member

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    I'm on a Macbook and that's the only new PSU I have. Sigh.
  10. hans5849

    hans5849 Serious as a heart attack

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    Sounds like the problem I had when my video card was shorting out...
  11. Zenjiro

    Zenjiro New Member

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    strip out all the extra parts, leaving only the cpu, hsf, mobo, and psu.
    Attempt to boot, if it beeps at you then those parts are likely not the cause of the problem. add ram next, then vid card, and drives are the very last thing.

    A different psu you be a nice touch also.

    Also, did you just recently mount the mobo? there is always the possibility of a short.
  12. Adam12

    Adam12 Junior Member

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    Also check the mobo for bad caps, if you need help identifying them check out badcaps.com
  13. mistawiskas

    mistawiskas kik n a and takin names

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    check to see if you have any part of the mobo grounding on the chassis. i had a screw lodged between a solder joint and the chassis and it did the same thing. the short caused the fault protection in the PSU to kick in as well as the healthchip on the mobo to shut it down. other than that, sounds like a bad cap somewhere like Adam12 said.
  14. ThatHideousStrength

    ThatHideousStrength Junior Member

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    Thanks, my case should be coming in soon so I'm gonna transfer cases and make sure it's mounted right.
  15. ThatHideousStrength

    ThatHideousStrength Junior Member

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    Everything is stripped and it's unresponsive. I don't think the Mobo is functioning because when I hold the power button it doesn't even attempt to shut off. I have to turn the PSU off. What a bust, this thing worked fine when I did use it.
  16. demonizeZ

    demonizeZ Junior Member

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    When i build new pc for my use, some time they give me problems like not starting or beeping etc. Not sure why but when i just take it out of the tower and put it together just out side on some cardboard they run fine; after that when i put them back in the tower they run fine. It make no sense to me but it works. So i just dont try to logicalize it rofl.
  17. ivanolo

    ivanolo Guest

    Unlikely that this will help, but... did you clear the CMOS?
  18. ThatHideousStrength

    ThatHideousStrength Junior Member

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    Yes I have. demoizeZ, I transfered the Mobo to the case I got in the mail today and it still pulls the same crap. I'm gonna have to say it's dead. I don't even get beeps. I've remounted the CPU and just turned it on and it still does it. Oh well.
  19. mistawiskas

    mistawiskas kik n a and takin names

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    Old MB?
    What mobo is it? all jumpers OK? any dips to set?
  20. Zenjiro

    Zenjiro New Member

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    have you tried resetting the cmos, on the same note, grab a multimeter and test the battery, there are some boards that will not boot with out a functional cmos battery
  21. mistawiskas

    mistawiskas kik n a and takin names

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    check post 17&18....................been there, done that.