04-20-2014, 06:49 PM
Mine is a 27" mid-2010 iMac. Been doing this a few months. Started out as random pink squares about 1/8" squares.
I ended up taking it to the local Mac dealer. They are still looking at it. It was a refurb from the Apple store and after 1 extra year of AppleCare, that expired Dec. 2013.

Fred
I ended up taking it to the local Mac dealer. They are still looking at it. It was a refurb from the Apple store and after 1 extra year of AppleCare, that expired Dec. 2013.

Fred