keeps shutting down randomly

Discussion in 'Mac Basics and Help' started by sam lims, Oct 12, 2008.

  1. sam lims macrumors newbie

    Oct 2, 2008
    Hello, maybe someone here can help me..

    I have have had my iMac G5 for at least 3 years now, it is out of warranty.
    I have Mac OS X version 10.5.5 build 9F33, I have 512 MB of RAM (I also want to add more RAM but not sure how to do this yet). I run it with an external hard drive.

    My monitor just goes black and I hear the computer shut down, when I'm in the middle of something it will do this.

    Sometimes it was fine for a few days, then on one occasion it kept shutting down within minutes of being turned on.

    ? ?
  2. italiano40 macrumors 65816


    Oct 7, 2007
  3. JediMeister macrumors 68040

    Oct 9, 2008
    Try this solution, if it doesn't work you can still bring it in to an Apple-authorized service provider or a retail store to have them take a look at it:
  4. Reflow macrumors 68000


    Mar 30, 2005
  5. sam lims thread starter macrumors newbie

    Oct 2, 2008
    thanks people, what is a logic board, approx how much is a new one? i can't find my EMC number yet, it's not where it's supposed to be.
  6. st1ngo macrumors member

    Oct 25, 2008
    Its not the Logic board
    It is the power supply
    Mine went to Apple yesterday and even though its out of the 3 year warranty they are still replacing power supply for free !
    Contact Apple care and they will sort it.

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