Solved! my headphones are connected ONLY to my TV on mute. When I am not using headphones and try to un-mute I get no sound from tV

Solution
Usually when you plug the headphones in it cuts off the built in speakers whether you mute the TV or not. This is a mechanical disconnection of the ground wire going to the TV speakers. It's not controlled by the TV remote.
If you TV manual says something else that would be rare
Usually when you plug the headphones in it cuts off the built in speakers whether you mute the TV or not. This is a mechanical disconnection of the ground wire going to the TV speakers. It's not controlled by the TV remote.
If you TV manual says something else that would be rare
 
Solution