2006 Intel iMac - Possible dead PSU?

Discussion in 'Mac Basics and Help' started by maddie, May 1, 2011.

  1. maddie macrumors newbie

    Aug 25, 2005
    Glasgow, UK

    I've had my late 2006 iMac for five years now and have had very few problems with it over the years - I had the LCD panel replaced by Apple last year due to a known issue and that's it.

    I use the iMac overnight to play audiobooks, and this morning I noticed I couldn't hear it burbling away when I woke up. It appeared to have switched itself off overnight, but then it wouldn't start up again. Nothing was happening at all - I checked all the cabling, including trying different power sockets and trying the mac's power lead in another bit of kit and vice versa - nothing at all.

    I got the service manual online and managed to get the bezel off to check the diagnostic LEDs. All appeared dead at first, which indicated that it needs a new power supply which is what I figured from the start.

    I read somewhere that removing and reinserting the battery can fix such problems, and since I tried this, diagnostic LED number 1 (indicating that the power supply is getting good power from the AC outlet according to the manual) now briefly flashes on at the point where the power cable is plugged into the mains, but then goes off again. Nothing still happens when the power button is pressed.

    Has anyone got any ideas on this? The manual is clear on the issue if the light doesn't come on at all, but I can't find mention anywhere about it coming on briefly.

    Many thanks! :D
  2. cluthz macrumors 68040


    Jun 15, 2004
    It's very likely the PSU is dead, it could be the

    Here is a guide to replace it:

    (White 2006 iMac 20-inch, look around the site for other models if this isn't yours)

    Getting a new one from apple will most likely cost you around $500, but it should be able to get one for about $100 used, but with some risks.

    Did a quick google and here is a new one for $118:
    I don't know anything about the shop that sels it tho.
  3. maddie thread starter macrumors newbie

    Aug 25, 2005
    Glasgow, UK
    Thanks Cluthz - thanks for that. Glad it sounds like I'm on the right track. I'm looking around for spares on ebay and will call a couple suppliers on Tuesday after all the bank holidays - I'm in the UK so would prefer to buy from this country.

    Grumpy as I was just about to replace the iMac!
  4. wendykatz macrumors newbie

    Feb 10, 2013
    dead "power supply". VIN IMAC 24" 2006

    Maddie, i have the same problem as you :(
    My computer has just died and the apple store indicated that it is a "power supply" issue.
    Does anyone know where i could get my hands on a UK power supply for a 24" 2006 iMac?:rolleyes:

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