internal power button works, external doesn't

Discussion in 'iMac' started by memphismac, May 26, 2011.

  1. memphismac macrumors member

    Oct 22, 2003
    I've got a 6-year old iMac G5 that has served me well.

    Yesterday, it flipped out, giving me some weird colors before ceasing operations.

    When I re-booted, it gave me some old colors, turned the power light off and just hung on a grey screen.

    I followed the excellent Apple instructions here - - and I've found that it boots just fine from the internal power button. But when I put the cover back on and try the external power, no dice.

    A few years ago, the Genius Bar did some sort of recall/electrical fix on it. A blown capacitor, I think.

    Any ideas why this is happening?
    And what, short of buying a new iMac, can be done to fix it?
  2. teal macrumors newbie

    Jun 4, 2011
    Same issue

    I'm having the same issue. I had a local technician look at it, he said he resoldered a capacitor (which I doubt). He said it booted and worked.

    The internal button boots the system, but the external button doesn't. The only info I can find online tells me to take it to apple. Apple said I need a new power supply, which was not the case (obviously, since the internal button works). Any ideas? I'd love to have this machine back up and running.

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