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  1. #1


    Member Since
    Apr 01, 2011
    Location
    Bristol, UK
    Posts
    2
    Specs:
    PowerMac G4; Dual 1GHz; 1,5 GB RAM; 300 GB HDD; GeForce 4 MX 64 MB
    PowerMac Dual 1ghz ?power supply? problem
    Hi guys!

    recently I got a used PowerMac G4 Dual 1GHz, 1.5 GB RAM and 300 GB HDD. I was told that it was broken. It stood abandoned in the office for a very long time. I took it home and plugged in to the socket and I found that it was working fine. Actually it was working fine for two days . On the next day I tried to turn it on with no luck. Light on the power switch lights up for a sec, fan spins for a sec and that's it. I took computer apart, tried to make it work with one memory 512, with two and with three with no luck. I checked all cables etc. Nothing. Next day in the morning I tried to boot up the G4 and success! I downloaded all the updates but when I restarted computer it didn't boot up again. I had to wait 15 minuts to boot it up again, but then after 3 minutes running system freezes and I can not do a thing. When I restart G4 it won't boot up again. Again I have to wait some time to force it to start but again after a while it freezes (I can see desktop, but can not do a thing), after restart won't boot up. Again I have to wait 20 minutes or so and it will boot up with the same result as I described above. Sometimes when the computer is switched off but plugged in to the socket I can hear ticking noise comming from the psu. Does it mean that the psu is faulty? At the moment there is 344 watt psu fitted. Any help will be much appreciated. cheers, simon

  2. #2

    chscag's Avatar
    Member Since
    Jan 23, 2008
    Location
    Fort Worth, Texas
    Posts
    47,147
    Specs:
    27" iMac i5, 3.2 GHz, iPad 3, iPhone 5c, iPhone 6+, 3 iPods, El Capitan
    It does sound like the power supply may need to be replaced. Go here for the parts and instructions to change it out.

    Note that this site is in the US but it's my understanding they will ship to the UK.

  3. #3

    harryb2448's Avatar
    Member Since
    Nov 28, 2007
    Location
    Nambucca Heads Australia
    Posts
    21,212
    Specs:
    27" 5K iMac, 3.3GHz, 256GB Flash Storge, 16GB memory and OS X.11.3.
    No link Chairlie.

    And whilst at it junglist change the PRAM battery.

    http://www.macproonline.com/Replacem...-p5636694.html
    Hang on to those original install discs like grim death! Using OS X.7 or later make a bootable USB thumb drive before running Installer!

  4. #4


    Member Since
    Apr 01, 2011
    Location
    Bristol, UK
    Posts
    2
    Specs:
    PowerMac G4; Dual 1GHz; 1,5 GB RAM; 300 GB HDD; GeForce 4 MX 64 MB
    Quote Originally Posted by harryb2448 View Post
    No link Chairlie.

    And whilst at it junglist change the PRAM battery.

    Replacement Power Supply for PowerMac G4 QuickSilver
    Thanks for advice. I've checked the pram battery with volt meter and it shows 3.6v, which is just fine.

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