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Atx Power Supply


jerrymac

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I converted a few (5) new ATX power supplies for DMX use.

I have 2 that have the same issue. One powers off as soon as a load is applied. (after a few minutes you can power back on but again fails as soon as you apply load).

The second has the same issue but not immediate and not every time.

I have crossed the green wire to one of the black wires.

The others seem to worm fine.

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Just like a bird man to be thinking of worms. LOL

Question, the unit that fails as soon as you put a load on it. Is this load the same that is being put on the good 3 P.S.s? I mean the same strings of lights, not simular. I am wondering if it is the P.S. or the load. P.S. sounds like it does not like the load, like the load has a short or the load is greater than the P.S. is built to handle. And the 5th one that will run for a time and then fail. Something is warming up and failing. Is this again a common load that you are testing all of the P.S.s or is it a different load again?

Really need more details before I could say what needs a closer look at.

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The issue with using ATX power supplies is that they are designed for use with more than one voltage and if you supply 1 voltage to one load only then this can cause the power supply to fail as you end up with a load imbalance within the power supply. Some power supplies can handle this and other will not, I dare say that may be what is happening, try putting some load on the other voltage outputs and see if it will work for you then.

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