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    #1

    Starting a PSU.

    Hello Everyone,

    I was just wondering if there's a way to test PSUs without using a motherboard?? I heard that there's a technique where we can connect a wire from the green to black cables and the PSU would turn on?? I'm not very sure what they mean by that?? is it just any green cable to any black cable?? or is it specific cables??


    Thanks.
    Don't find love, let love find you. That's why its called falling in love, because you don't force yourself to fall, you just fall. - Anonymous
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    #2
    Re: Starting a PSU.

    There is only one green cable on the ATX connector, connect that to any ground cable (black)

    It's good to have atleast some load on it, like an old HDD you don't care about or so, else the voltages will be waaay off...
    "The one who says it cannot be done should never interrupt the one who is doing it."

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      #3
      Re: Starting a PSU.

      I am not sure of the specifics at the moment, however you can 'jump start' a power supply by shorting two wires on the atx connector. Basically this makes the power supply think that the power switch has been flicked on.

      However it is advisable to not start a power supply with no load. Therefore you should add some devices to the power supply, this will draw some current. Old hard drives or faulty hard drives usually do well.

      Edit: I see that Per Hansson beat me to it.

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        #4
        Re: Starting a PSU.

        Originally posted by Per Hansson
        There is only one green cable on the ATX connector, connect that to any ground cable (black)

        It's good to have atleast some load on it, like an old HDD you don't care about or so, else the voltages will be waaay off...
        After reading some articles on the Internet about ATX pin configuration, I realised that there's only one green cable. Pin #14 If I remember correctly.
        I had to rely on the images of the shapes of the ATX pins on the internet to find the green cable as I have hereditary colour blindness.... my uncle also has colour blindness....

        I can't see the differences between Green, Brown and sometimes red.... I can sometimes tell the difference between them by relying on colour tone. Green is a lighter colour than brown, that's about all I know about those two colours.

        The other cable which looked like green was a grey cable. It's very tricky working with electronics when I have this problem. I have to rely on my brother to check my wiring connections everytime I finish something because he doesn't have the same issue as I do.

        Thanks.
        Don't find love, let love find you. That's why its called falling in love, because you don't force yourself to fall, you just fall. - Anonymous

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          #5
          Re: Starting a PSU.

          Ok, well, there are many pinout sites, like pinouts.ru for example

          And the green cable is oftenly the thinnest one on the ATX connector because it's just a signal cable...
          "The one who says it cannot be done should never interrupt the one who is doing it."

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            #6
            Re: Starting a PSU.

            just get a psu tester. its more convenient than having to remember the pinout each time
            capacitor lab yachtmati techmati

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              #7
              Re: Starting a PSU.

              Yeah you can do the above kick start it with a load
              or as Will said get a psu tester

              See EZ psu tester post

              It will kick it over under a very light load (one 1 rail) and give you an idea of how close the voltages are
              (I'd use a real load and DVM for true accuracy thought)

              Good enough and simple enough to use to get an idea on how a psu working.
              $35~50 bucks odd AU.

              there is a post I think yantz did on this, but Id have to find it


              cheers mate, all
              You step into the Road, and if you don't keep your feet, there is no knowing where you may be swept off to." Bilbo Baggins ...

              Comment

                #8
                Re: Starting a PSU.

                A PSU tester is a low cost first step. Unfortunately the power draw is so low that power supplies with enough bad caps to not run a board can still light up a tester. The PSU tester also doesn't notify you if a little bit bad voltages are present. I test with old P2 boards to ensure that the power supply is good enough to run something without burning it out.
                sig files are for morons

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