2011 imac power supply looks like something melted inside?

Discussion in 'iMac' started by kjid, Dec 20, 2012.

  1. kjid macrumors regular

    May 3, 2011
    My iMac started making very annoying noises which is a known problem with the power supply. I opened up the iMac to check on it and found this:


    Is that the way these things look like? Is the creamy yellow stuff some kind of thermal paste? Or is this power supply damaged?

    The iMac does still work, it starts making the noise when playing games and increases when i higher the brightness.

    Any quick help would be greatly appreciated!
  2. Shadow2k macrumors member

    Apr 10, 2009
    Looks like they used glue to keep the parts in place before soldering them. There isn't any visible damage at least. What you hear might be coil noise.
  3. kjid thread starter macrumors regular

    May 3, 2011
    Thanks for your reply. I wasn't aware of coil noise until now, that could be it. I'll try to re-assamble the imac taking note of the cables.
  4. harcosparky macrumors 68020

    Jan 14, 2008
    Yeah, looks like some positioning adhesive applied a little too freely.

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