A yr ago the red light at the bottom would come on and I would lose the picture . after changing the bulb the problem went away. most recently this started to happen again and soon I lost the picture. I replaced the bulb again and now the red lights on again at the bottom and still no picture. Is there some sort of reset I am to do after changing the bulb or whats the problem . Red light is sold and not blinking. I have sound but no picture. Please help