My Mitsubishi WT42311 randomly shuts off. It just started about a month ago and the symptoms are it will work for usually a few hours and the screen flickers(and pops sometimes) then it shuts itself off. If you turn it back on it sometimes will shut right back off and sometimes it will stay on for another hour or longer sometimes. I thought it might be an input signal issue due to the flicker and pop sound but the problem is definitely isolated to the tv. I am currently thinking that it is a power supply issue or a potential convergance problem. I don't get any error codes by pressing input and menu together. ( I think I am doing it correctly). Has anybody had or solved this issue before?