I have an older 50in Toshiba Projection TV. With the exception of loosing picture quality, which is expected, the tv has been a real workhorse. Until Now. Over night all inputs stopped working on the tv. The menu still comes up on the tv when prompted, and everything seems to be working with the exception of not processing any signal sent to it. What could this be???

Televison & Video - Toshiba - 50H82 50" Rear Projection Television