Dead iMac G3 - Any help please?

Discussion in 'Apple Collectors' started by Pixellated, Oct 11, 2009.

  1. Pixellated macrumors 65816

    Apr 1, 2008
    Hi, I have just taken ownership of a G3 iMac in Tango, It is the slot load model but I cannot for the life of me get it to boot. It would be good to fix it as an iTunes Server. I plug in etc... And press the power button but nothing l
    happens - No light, no noise, no nothing. I have tried switching power leads, but that is it. Anyone have any experience with these?

  2. Theclamshell macrumors 68030

    Mar 2, 2009
    honestly, its not worth it, its probably a psu issue and you could just get another one on craigslist free or your computer dump
  3. Pixellated thread starter macrumors 65816

    Apr 1, 2008
    Hey- it was free when I got it, I think I'll use it for a mod or something.... Thanks anyway for your input. :)
  4. savoirfaire macrumors 6502


    Nov 23, 2003
    New England
    The other thing that was pretty common with these iMacs was that if the user attempted to install OS X without updating the firmware, it would essentially brick the machine. There have been some fixes offered, but I'm not sure if that's what happened to the iMac that you have.
  5. Theclamshell macrumors 68030

    Mar 2, 2009
    imac g3 fishtank lol or catbed
  6. Pixellated thread starter macrumors 65816

    Apr 1, 2008
    You are SO a midreader....
  7. Mars478 macrumors 6502a


    Mar 6, 2008
    NYC, NY
  8. macgeek18 macrumors 68000


    Sep 8, 2009
    Northern California
    Try taking out the ram and putting it back in,the the HD.I have one that had issues and that what was causing the problems.
  9. quantum003 macrumors 6502a


    Apr 27, 2009
    People are too hard on these G3's in my opinion... it's kind of find to play mad scientist with them, and if you break them... well who cares.

    If you can get OS X on one of them though, even one as slow as 333Mhz, it's still a great machine for a kid.

    In your case though, I agree with the poster who said to check the RAM. Probably not in there correctly, or the RAM is bad altogether... did you happen to put PC133 in a machine that only goes at 100 speed?
  10. Archon Gold macrumors 6502

    Jun 7, 2009
    Canada, Ontario
    its either the Power supply (a relatively easy fix) but if its the PAV board, i wouldnt even bother with it.
  11. MacTech68, Oct 18, 2009
    Last edited: Jan 30, 2011

    MacTech68 macrumors 68020


    Mar 16, 2008
    Australia, Perth
    Perhaps the easiest thing to do is to get another (preferably one that at least powers up) and start by swapping the Down Converter.

    The Down Converter board plugs on the the side of the iMac's logic board. It's unusual for them to fail but you can at least narrow it down to either the Analog board or the Down Converter or Logic board.

    I saw a lot of these machines with dry solder joints on the fly-back transformer but getting the analog board out to resolder them is not for the faint hearted if you've not attempted it before.

    Do yourself a favor, and get a take-apart for the machine.

    Google the following for your model:


    how to roll a joint

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