My TV shows picture just fine its just that the buttons on the TV won't work when being pressed and the remote doesn't respond either. Now the TV is stuck at whatever channel and volume that was set last time it worked. I would like to be able to switch from TV to video so I can watch movies again and play XBOX. I am an electronics tech. but need some schematics so I can do some troubleshooting. Any advice would be greatly appreciated. Thanks