I don't know about you, but I can't stand those gas pump TVs. All you want to do is fill your tank and they're sitting there going YAPPITY YAPPITY YAP at you the whole time you're pumping. Argh!
One day, I started playing around with the buttons surrounding the screen as some dingledork on the tube was doing his YAPPITIES. I discovered that one of the buttons is the mute. It's always worked for me, but yours might be different.