How do I diagnose occasional failure to power up?

Discussion in 'iMac' started by odaenathus, Jan 4, 2010.

  1. odaenathus macrumors newbie

    Jan 4, 2010
    Hi All,

    Have a white iMac (2Ghz Core Duo, 20" screen). It has started misbehaving slightly: it usually takes two or more tries to start from off, and has to have a hard restart if I've let it go to sleep on its own.

    If I have made it sleep myself, by pressing the power button, it always comes back, but it refuses to do so if I let it sleep on its own.

    My local reseller suggests that it may be a logic board fault: I'll have to pay £70 to diagnose this and, if that's the case, the repair is uneconomic, meaning I've also wasted £70 ...

    I've run an expired version of techtools, which suggests something is up, but won't tell me unless I upgrade to AppleCare. Can any suggest any further diagnosis I can do on my own? For example, is it worth trying a full backup/restore?

    Thanks in advance!


    (And yes, I'd really like a new quad core, but I'm not throwing out kit I can reasonably salvage ...)
  2. HyperX13 macrumors 6502

    Sep 3, 2009
    My youngest son has the 20 inch imac and it has had that issue since snow leopard was put on. I just turned auto sleep off and we just make sure the computer shuts itself down at 9pm (via parental controls). I know this is not a solution you are looking for but it seems we just need to wait for Apple to address the issue.

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