Problems with power on after power surge....

Discussion in 'iMac' started by dkaff, Jul 9, 2012.

  1. dkaff macrumors newbie

    Jun 22, 2010
    Hi All,

    There was a power outage in my area a few nights ago. After the power was restored I noticed that my wife's 17" Late 2006 intel iMac won't power up. I tried unplugging it, restarting, clearing the PRAM etc., but still nothing. I have noticed on occasion though that the sleep light comes on very dimly when the computer is supposed to be on. I was just wondering if anyone could help me figure out what the problem might be. Oh, and did have it connected to a surge protector when this happened.


  2. mentaluproar macrumors 68000


    May 25, 2010
    Ohio, USA
    Try resetting the system management controller.

    EDIT: You already tried that. Sorry. That dim power light makes me suspect your power supply got fried. I don't know if these are separate or part of the logic board. If you can afford it, make an appointment to have an apple store genius look at it. If you are feeling adventurous (and its out of warrantee anyway) you can try to replace the part yourself, but that's WAY deep inside there and best left to the pros.
  3. GGJstudios macrumors Westmere


    May 16, 2008
    PRAM/NVRAM has nothing to do with power issues. Resetting it will not help. Only resetting the SMC addresses such issues, so try that.
  4. jav6454 macrumors P6


    Nov 14, 2007
    1 Geostationary Tower Plaza
    Surge protector don't prevent damage caused to electronics during a sudden power outage.

    It is very likely the power supply of your iMac got damaged during the sudden power loss.
  5. dkaff thread starter macrumors newbie

    Jun 22, 2010
    follow up information on iMac

    Hello again,

    I took a drive yesterday to the closest Apple store and after hearing my description (and plugging in their diagnostic cable) they told me that based on my information it was most likely the power supply or motherboard. So, I am interested in using my multimeter to test both pieces of hardware. I'm not all that familiar with how to use a multimeter but figure that I can do it. I do have one slightly bulging capacitor on the power supply and I'm going to get to looking at the motherboard later today. Can anyone offer any suggestions? I know that it would be easier to just get a new iMac but this certain one belongs to my wife and fits (and matches) perfectly in a small space that we have for it. Thanks in advance for your help!

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