I had the same issue 2 weeks ago. Unplugging the sound bar for a few seconds was the remedy for us. It's plugged into the back of the cabinet. Just follow the power cord on the sound bar.
Hope that helps, Brian
Brian and Julie
Zola & Hamilton (Rhodesian Ridgebacks)
2016 Anthem 44L ,2015 Anthem 44L, 2009 Discovery 40X
2014 Jeep Grand Cherokee FMCA #420209