Hi Guys, Today suddenly whilst playing a game, I got a dark line in the middle of the screen that doesn't want to go away. I tried restarting the machine - no go. Tried removing and inserting the RAM too, no help. I then read about blotching and image retention with the late 2012 iMacs and was confirmed the display is faulty. Any ideas what could have caused the issue. I have had the iMac for 36 days. Called Apple care and they mentioned Replacement is done only within 30 days however they would call up tomorrow and confirm what is the next steps.