Hi I have a 2 year old HLP5674W and last week out of nowhere there appeared a hook (backwards J) outline on the screen and is only noticeable on light backgrounds. It is yellow in color and takes up 1/3 of the screen. On the top middle there seems to be another small yellow smudge (not on the outside) and it seems to be waving back and forth as if the fan is making it move. Strange, i know, but could something have come lose and fallen in front of the lamp or is this somewhat common. Samsung tech to call back with an appt. but I am assuming will be costly. Any ideas?