Does this sound like a bad power supply?
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Thread: Does this sound like a bad power supply?

  1. #1
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    Question Does this sound like a bad power supply?

    A couple of weeks ago I hit the power button on my PC and it didn't turn on. I cycled the switch on the power supply, then hit the power button and it came on. No problems right after that.

    Then I moved, and I didn't hook up my PC for two weeks.

    I hooked it up last night, tried to turn it on, it turned on for ~2s then turned off. I tried again, nothing. I cycled the power supply, kept trying, the best I could ever get it to do was run for 2s. I tried another wall socket to be sure, same thing?

    Bad ps? It's an Antech, iirc it was high dollar (for a ps). If it's broke, I'll probably just buy a cheapo. It's for a 1GHz Athlon w/ 5 or 6 IDE devices.

  2. #2
    photolady's Avatar
    photolady is offline Lifetime Friend of Site Staff
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    How new is the psu? Could be power supply but it also could be the CMOS battery.

  3. #3
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    Try pushing the button and holding it in a couple extra seconds.
    If you're happy and you know it......it's your meds.

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    You moved and did you pack the PC in such a manner that the mobo was on its back?
    If not, then my first guess is something has come lose somewhere. Need to make sure everything is plugged in right.

  5. #5
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    Originally posted by photolady
    How new is the psu? Could be power supply but it also could be the CMOS battery.
    I think I replaced the powed supply maybe 3-4yrs ago, the rest of the box is maybe 6mo older than the power supply.

  6. #6
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    Originally posted by Steve R Jones
    Try pushing the button and holding it in a couple extra seconds.
    Tried, did not work.

  7. #7
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    Originally posted by Train
    You moved and did you pack the PC in such a manner that the mobo was on its back?
    If not, then my first guess is something has come lose somewhere. Need to make sure everything is plugged in right.
    I probably did. I think I laid it in the back seat of my car.

  8. #8
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    photolady is offline Lifetime Friend of Site Staff
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    You probably did that? You really should check to make sure everything is tightly seated, and connected. Check the battery is still in place also.

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    Will do.

  10. #10
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    No loose connectors that I could find. I popped out the CMOS battery and put it back in, I pushed in all the connectors, fan connectors, etc. I watched it, all the fans spin up like normal, then the PC shuts off at about 1 second.

    If I turn the ps off for several seconds until it makes an electronic "squeek" noise (I assume it's capacitors discharging or something like that), then I can turn it back on and it will do it's 1s power-on thing again.

    This seems to indicate to me that it's a bad power supply??

  11. #11
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    I CANT SEE HOW THE CMOS BATTERY Would have anything to do with it

    i would only surmise its a bad power supply

    it never stays on?

  12. #12
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    Originally posted by tewetzel
    No loose connectors that I could find. I popped out the CMOS battery and put it back in, I pushed in all the connectors, fan connectors, etc. I watched it, all the fans spin up like normal, then the PC shuts off at about 1 second.

    If I turn the ps off for several seconds until it makes an electronic "squeek" noise (I assume it's capacitors discharging or something like that), then I can turn it back on and it will do it's 1s power-on thing again.

    This seems to indicate to me that it's a bad power supply??
    I agree, something is wrong in there.

  13. #13
    DrMDJ is offline Virtual PC Specialist!!!
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    Not sure about the "sqweek" sounds (PS shouldn't be squeeking), but that may also be a noise from the ps fan.

    You can test the fundimental operation (ie. the voltage levels) of the PS. This could also be the motherboard gone bad too.
    Please remember to post back whether your problem is resolved or
    not, so that others may gain from the knowledge.

  14. #14
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    Originally posted by DrMDJ
    You can test the fundimental operation (ie. the voltage levels) of the PS. This could also be the motherboard gone bad too.
    How? What should the voltages be, and on what connectors/pins? I have a cheapo multimeter, not sure what the current rating is.

    Somebody recommend an affordable new power supply to push my Athlon 1GHz, two hard drives, two DVD drives, and a Zip drive.

  15. #15
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    Here's how to test the voltages:

    Testing PSU voltages

    As to PSU brands, you get what you pay for, and cheapo PSU's can be costly in the long run, especially if they fry anything. I like Antec and Enermax myself.

    http://www.tomshardware.com/howto/20040122/index.html

    http://www4.tomshardware.com/howto/2...pplies-05.html

    http://www4.tomshardware.com/howto/20030609/index.html

    http://www4.tomshardware.com/column/20011012/index.html

    http://www.anandtech.com/showdoc.html?i=1774
    Nick.

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