[Popester]

I doubt there is anything wrong with that tv. When that set is turned on without a signal source it will hunt for a channel. If it’s a red bar showing at the top it is searching for channels VHF 2-6. If the bar at the top is yellow it is searching for channels VHF 7-13. If the bar is green it is searching for Channels UHF 14-83. If you attach a dvd or vhs player to the external input the graph bar should find the channel and disappear. These sets will show a bar if no signal is detected. The buttons the operators manual is referencing is behind a little door on the front of the tv near the power on/off button.