Check amplifier for TV antenna... I have been known to leave that on.
Never thought about that one. My booster button is located on the side of a cabinet in the back of the trailer hidden from view. I'll have to remember to turn it off, but also turn it back on once at a campsite.
FYI: this past weekend was listening to the ball game on TV, but also noticed that the booster button also boosts the signal for the radio too. I usually turn the TV volume down and listen to the radio broadcast of the game.