A buddy of mine at work has a 42" Sony HD monitor (dont know which model, one of the newer ones) Anyways last night at his house I noticed a green ring about 12" in diameter right in the center of his screen. Now this was really faint but you could see it definetly in light/white scenes. Any idea what could be causing this?? The TVS only 3 months old! tHANKS gUYS!