Antec truepower tpq 850w problem?

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  • aidynphoenix
    Member
    • Jan 2012
    • 34

    #1

    Antec truepower tpq 850w problem?

    this was in my brothers computer, he said he heard a pop sound, followed by smoke and a bad smell..
    he found a burnt transistor on his motherboard.

    not sure which part was the cause or effect, psu, or motherboard.
    so he gave it to me because i have recapped a number of powersupplies in the past and he didnt want to risk loosing another motherboard.

    none of the caps appear to be bad, i see no buldging.
    i think i am going to have to unsolder some wires to get the main board out so i can give it a good inspection for bad parts.

    when its plugged into a outlet it gives off a faint squeel sound. this is without any computer connected.
    i havent tried it with a motherboard for fear of killing it.

    if i jump the green power connection pin to ground, the fan starts up.

    with my multimeter im getting the correct voltages.
    12+ 12.1v
    5+ 5.1v
    3.3+ 3.3v
    12- -12v blue
    5+ 5v purple
    ? 5+ grey
    this psu doesn't have a white wire for -5v

    should i just go ahead and try this motheboard on a older computer? or is there a better way to approach this?
    ty
    ~john
  • selldoor
    Slow Learner
    • Dec 2010
    • 7870

    #2
    Re: Antec truepower tpq 850w problem?

    Hi - there are a number of articles on the net regarding this PSU whining.
    This is one: http://hardforum.com/showthread.php?t=1452928

    Voltages seem ok if steady I suppose you could make a load with high wattage
    automotive bulbs - cheaper than a motherboard.

    I believe you can also test for excessive ripple by testing the output with your meter on AC instead of DC but I dont know enough to know what the results would mean - You could do the test and post the results and someone with
    experience of PSUs might be able to advise.
    Please upload pictures using attachment function when ask for help on the repair
    http://www.badcaps.net/forum/showthread.php?t=39740

    Comment

    • dmill89
      Badcaps Legend
      • Dec 2011
      • 2534
      • USA

      #3
      Re: Antec truepower tpq 850w problem?

      I don't suppose that it was connected to an older model nVidia video card was is? I have a TPQ-850 on my main rig and they are an excellent PSU (Built on a high-end Enhance platform), but they have a known compatibility issue with certain older nVidia cards that can lead to failure (I believe this was determined to be the fault of the video card and not the PSU itself). I've been running mine with an ATI Radeon HD5870 and have yet to have any issues with it.

      Comment

      • aidynphoenix
        Member
        • Jan 2012
        • 34

        #4
        Re: Antec truepower tpq 850w problem?

        after testing I think the psu is fine. got a spare computer out of the closet, and it ran just fine.. assuming the motherboard that it was on was the issue. used the multimeter while it was running and the voltages were still the same as above..

        thanks guys!

        Comment

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