How do you get this set to auto-program it's channels? I can get it to search manualy for the first 16 channel numbers, but thats all the higher the numbers go. This set should be at least 100 + channels capable. In fact, I'm sure it was. I've recently pulled the set out of the closet its been setting in for years... works great, except its only got 16 channels. Can someone please tell me the proceedure for reprogramming this 13" little monster!