After using my new Hub for a few days, I paused to repackage several movies to MKV. Went back to try them out and…no sound. Not from the movies, not from YouTube or Mediafly, nothing. I’m sure I’ve done some newb thing and pressed a button or something but I’ve tried all the audio setting and nothing seems to make any difference. Surely this has happened to someone else before - any advice? I’m stumped.