My Hitachi 60" did the same thing under warrenty a couple of years ago, I called them and the repairman told me it was the video chip, it didnt take him but 5 seconds to replace the chip and the reciept said it would of cost me about $250, but you could probably get on some forums and find out exactly what chip it is and replace it with no problem, because I dont think mine was soldered just pins If I remember correctly, I would take a look but I sold the TV a couple of months ago.