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Thread: Did I just Bork My M4-ATX

  1. #1
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    Did I just Bork My M4-ATX

    Wasn't paying attention and hooked up - to + and + to -.

    Pretty stupid. And now my M4-ATX keeps blowing the fuse.

    Is there something other than a borked PSU that could be causing this?

  2. #2
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    Sonicxtacy02's Avatar
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    can you see any parts that are fried? Any smoke?
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  3. #3
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    Bugbyte's Avatar
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    Probably fried. Take a look on the M4 to see if there is an integrated fuse. I don't think there is, but you never know.

    If you shredded it, chalk it up to experience. I zapped a $500 LCD from static electricity on the carpet. Everyone does it at some point.
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  4. #4
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    There's a fuse on the M4, but that was blown too. I'm looking for something other than that?

  5. #5
    FLAC
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    you might be able to rma it if its under warranty. i know it was your fault, but it probably wouldnt cost them much to fix it and im sure they would want a happy customer. to be honest that power supply should have reverse polarity protection, its a little lame that it doesnt.

  6. #6
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    Quote Originally Posted by trader007 View Post
    to be honest that power supply should have reverse polarity protection, its a little lame that it doesnt.
    I can sympathize with the designer here. Reverse polarity protection is hard to do at the high currents and low voltages that we're dealing with here. Just guessing, but I'd say that supply will easily pull 15-20A on the primary side under peak load. There aren't many diodes that will pass that without having a VF of a volt or more, which would degrade the supply's ability to operate during low battery voltage conditions.

  7. #7
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    Quote Originally Posted by joe_p View Post
    I can sympathize with the designer here. Reverse polarity protection is hard to do at the high currents and low voltages that we're dealing with here. Just guessing, but I'd say that supply will easily pull 15-20A on the primary side under peak load. There aren't many diodes that will pass that without having a VF of a volt or more, which would degrade the supply's ability to operate during low battery voltage conditions.
    youre right. even to do it electronically "soft start" would be expensive too... its a tough call though, because since its not a proprietary hookup its always easy to connect it in reverse. you would think there is some cost effective way to stop a complete system meltdown in case of this...

  8. #8
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    It's called not being stupid. Dang. I'm so po'ed at myself.

    Thanks for all your help.

  9. #9
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    we all do it, i broke my xenarc doing the same thing. Its a good lesson learned, now i check polarity with every plug!

  10. #10
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    Wouldn't you know it....I bought a new M4-atx, hooked it up and the fuse blew.

    I completely unhooked *all* my connections, re-hooked it up, and the old one works.

    I really hope I take my time and shake off these moronic moments.

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