Question about HP ATX-300-12Z (ATX30012ZBD) 300-Watt Power Supply

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Blinking green light on Bestec ATX-300_12Z rev BD

All same symptoms as posted by bkenn 0n 2-12-08 additionally noticed that the light shifted to seady if the 24 pin connector to the motherboard was unplugged. This cause me to hesitate just a bit in thinking that the power supply is the problem. Just maybe the motherboard is the cause ???

Your quick assistance will be appreciated.

- Bruce Gram

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  • Martha Kile
    Martha Kile Dec 31, 2008

    I am having the same problem with mine. I also thought it maybe the power supply. Anyone know what it could be?



    my email: marthakile2000@verizon.net

  • Anonymous Jan 22, 2009

    Hi. Model ATX-300-12Z Rev. BD. Clicking sound, fast green blinking light. If connector to motherboard is unplugged, light stays green. Tried another non-compatible powersupply, computer on/off switch did activate that power supply, so I am "guessing" power supply is faulty. Will try to locate similar and replace. Did you find replacement? Where?

  • Anonymous Feb 04, 2009

    i left the computer of with the power supply of for 3 weeks and when i turned the power back on the computer will not start and has a blinking green light in the power supply i took the covers of and checked all connections they look ok so how do i get tis repaired thank you for your help



  • Anonymous Feb 15, 2009

    mine did the same thing. i'm going to go buy some cheese at the market and see if that helps.

  • Anonymous Feb 24, 2009

    Left computer unplugged for a couple of hours then when I plugged it back in...power supply light started blinking.

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It has a blinking lite whats wrong

Posted on Sep 08, 2010

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