tutorial - reviving a Mac G5 with dead PSU

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  • lavabo
    New Member
    • Sep 2014
    • 2
    • canada
    #1

    tutorial - reviving a Mac G5 with dead PSU

    Hi All

    A friend o mine had a Mac G5 with defective PSU and the mac was not booting.

    I had the idea of using a PC AT PSU and moved the pins to the mac connector. Ive found a few diagram about other people that have done it.

    PC ATX have 24 pins, Mac connector 22.
    For the 24 Volt, i used an old HP LAserjet 4 plus PSU, and the 24 V is on the Jumper 103, Blue and red wire. I connected those to the 21-22 mac connector as displayed on the pinout.

    here are some pictures:

    Mac booting


    Connector from PC and HP PSU


    Explanation of the measured voltage :


    Both PSU


    I used those picture from other to reuse my pinout




    Its now working great but a bit bulky with 2 PSU on the back! I should have used molex connector to disconnect PSU from the back but hey, my friend wanted to be cheap, it cost him only 2 beer.
    Last edited by lavabo; 09-19-2014, 12:59 PM.
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