I have a late 2009 27 inch iMac that is experiencing a display problem. There is a gray cloudy line across the right-hand corner of the screen, and when I turn of the system, it looks like there are "sun streaks" across that part of the screen as well. My DVD player/burner has also stopped working, and it is in the right-hand side of the system. Don't know if this is related. The system has always run very hot. Is this a heat issue? Has anyone seen this?