Sounds like you did hit a button on your remote. More than likely it's an audio button on the remote. This button typically selects an audio track on the dvd itself. It's either this or somehow during setup you've selected (depending on the rest of your audio setup) either the bitstream or PCM output for sound. I would just try hitting the audio button until you get something, or go into your dvd setup and try changing from either bitstream or PCM to the other choice.