I have this 2002 Sony flat screen tv that I have not turned on more than 80 times since I bought it. Two and a half years ago when I moved to a different address (I think the movers were not careful with it) it has done this: I connect it to cable and turn it on. It stays on for approx 5 mins, then cuts off. It will not turn on again immediately. There is a delay of hours. Should I junk it, or is it worth saving?