PSU Dead ? PC won't Boot

Discussion in 'OT Technology' started by keensab, Feb 17, 2007.

  1. keensab

    keensab Bang Boom Pow!

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    PC just shut off the other day inexplicably. Tried to turn back on, but all I got was clicking from the power-on button. Turned off psu from back and turned back on but still no response.

    Removed from MOBO and hot-wired <<http://www.pcdoctor-guide.com/wordpress/?p=3959>> pins 14 to ground and the fan will spin up inside the psu but the attached case fan with LED is nonresponsive.

    My PSU dead?

    EDIT:clicky already
     
    Last edited: Feb 17, 2007
  2. Coottie

    Coottie BOOMER......SOONER OT Supporter

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    why did you put those rediculous << >> tags around your link?? no clicky no care
     
  3. deusexaethera

    deusexaethera OT Supporter

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    In some languages, <<Hello World!>> is the same as "Hello World!" That is to say, <<>> are quotation marks.

    Either that or he was trying to make an < a href >< /a >.
     
  4. Coottie

    Coottie BOOMER......SOONER OT Supporter

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    true...but you can also simply copy n paste links so they work.

    Most computer repair shops have a psu tester....at least I thought they did. Been awhile since I had one go bad. They are easy to replace.
     
  5. Doc Brown

    Doc Brown Don't make me make you my hobby

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    So you hot-wired it and the case fan is nonresponsive.

    Are you sure that it was working prior to the pc shutting down?

    And how about some specs for your pc?
    It helps to know how old it is at the very least. What brand.
    What brand of psu. What cpu.

    Age = more chance of psu failure.
    Certain cpu's = hotter than fuck, and with a maybe bad case fan, a dead cpu.
    Crappy psu = probably a dead psu.
    Cheap ass barebones pc = probably dead everything.

    We need details, stat!
     
  6. keensab

    keensab Bang Boom Pow!

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    amd 754 mobo, with an Orion psu 12v 420w max that is close to 3 years old.

    In my previous post i noted that the fan that is integrated into the psu spins when hotwired, but does not spin when connected to mobo's atx and 4-pin power connectors.

    I swapped the psu with 2 other working psu's and they will not boot up the pc.

    Additionally I must note that my 2 of my 6 usb ports have failed in the past year with the latest the same day as my pc failing to boot up.

    Is my mobo dead?
     
  7. Doc Brown

    Doc Brown Don't make me make you my hobby

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    It sure sounds like it. But you could try to jump the pins for the
    power switch to make sure it's not that.
     
  8. keensab

    keensab Bang Boom Pow!

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    randomly playing with things I unplugged the LED jumper and after leaving everything plugged in for a bit... the fan on the cpu started up. After about 30sec's of running, the cpu fan slowed to a stop and the psu smelled like it was burning. Let things cool out because we at first weren't sure if the smell was from the psu.

    Replugged the LED jumper back in. Turned psu on and the front LED light came on and the cpu fan came on. The cpu fan slowed to a stop again, and the smell was verifiably the psu.

    **Weird side note ~ the smelly psu's fan nows spins on upon being plugged to power outlet only, as opposed to previously needing to be connected to a mobo or being hotwired with a paperclip.

    Cliffs ~ my original psu and a 2nd test psu didn't start anything up. Seemingly burnt 3rd psu kicks it on for like 30secs.
     
  9. keensab

    keensab Bang Boom Pow!

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    power switch is a 2pin connector.

    I'm not exactly sure I go about doing that. Swap it to a different set of jumpers... does it not matter ?
     
  10. Jay487

    Jay487 What's Life If You Ain't Enjoyin' It?

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    sounds weired but sometimes you can actually smell the power supply if it fried. Not always, but I've had one die on me and by smelling it (as close as you can) I could tell something cooked.
     
  11. Doc Brown

    Doc Brown Don't make me make you my hobby

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    The power switches are momentary on types, meaning they are only "on"
    as long as you hold them in.
    So all you have to do is jump the wire leads or pins for the normal second or two like you would do when you boot your computer.
     
  12. deusexaethera

    deusexaethera OT Supporter

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    This is a good reason to keep a few spare jumpers around.
     
  13. Doc Brown

    Doc Brown Don't make me make you my hobby

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    I keep one of those auto mechanic chromed magnetic trays for my
    screws/bolts/jumpers. It's amazing how full that tray has gotten over the years.
     
  14. keensab

    keensab Bang Boom Pow!

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    This psu emitting that smell is most likely dead as it only powers the cpu fan on the mobo for like 30secs, but it is just odd that two separate psu's fail to kick my pc up to run.
     
  15. Doc Brown

    Doc Brown Don't make me make you my hobby

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    That's why I suggested checking the power switch. It would really suck
    to go through the trouble of replacing the mobo and find out it's the switch.
     

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