Urgent Help Needed With iMAc 600

Discussion in 'Macintosh Computers' started by wainwain, Aug 15, 2004.

  1. wainwain macrumors newbie

    Aug 15, 2004
    Hi all, Im new to this forum, but i REALLY need some help with my imac. Its a iMac600 SE. The graphite coloured one. It all started with random sleep modes, the imac would just go into 'deep sleep mode' where nothing works. Ok i could live with that, but now it just wont turn on, and all im getting is a faint chirping noise. Nothing appears on screen either. when i hold down the power button for a few seconds it turns off again with a flash of the power button. Has anyone else experienced this problem? its only 3 years old. and i have no guarantee on it. Im hoping maybe its just the battery that needs changing at the back. All help would be greatly welcomed....
  2. Chaszmyr macrumors 601


    Aug 9, 2002
    I'm not sure I even know what to tell you :(

    Is there any chance it got fried? (that is, is it on a surge protector?) Do all the fans inside still function properly? To me it sounds like the boards are damaged somehow, but outside of an electrical surge i dont know how that would happen.
  3. wainwain thread starter macrumors newbie

    Aug 15, 2004
    No, i doubt its an electrical surge. after the brief chirp their is a high pitched buzz, also very very faint. Ive tried different plugs and dissconnecting everything. Nothing seems to work, nothing looks damaged and it still produces heat when left on. But the fan doesnt kick in. It feels like its missing a spark to start it all off. :( i think i might try replacing the 3.6v battery in the back to see if it makes a difference but they are hard to find! and if not then its a trip down the repair shop...
  4. wainwain thread starter macrumors newbie

    Aug 15, 2004
  5. vraxtus macrumors 65816


    Aug 4, 2004
    San Francisco, CA
    When in doubt... bad logic board! That could be what's accounting for the random sleeps and hardware difficulties...
  6. bhertz macrumors member

    Jan 29, 2004
    Columbus, Ohio
    What you have (most likely) is a bad flyback transformer. This issue is well
    known with old imacs. I have had two die in the lab I support in the last two months just like this. The imacs did not cool this transformer well enough and it shorts out internally. It is pretty expensive to fix most likely it is not worth it. The chirp is the computer sensing the short then shutting its self down. On the back of the imac there is a panel that you can remove to get to a external vga connection. Plug in an extra monitor and see if it works.

    Do a google search for 'imac ATX' to see how a lot of people have been salvaging the machines sans the monitor.
  7. wainwain thread starter macrumors newbie

    Aug 15, 2004
    great advice guys, yeah i've tried plugging in a monitor already, with no luck, so is it still the flyback transformer? what did you do with the old imacs? did you fix them? did yours chirp aswell? or could it be the logic board??? :confused: im so confused, and need it fixed soon.

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