Had the soundbar for a week, happy with the sound, but... Worked fine at first, then started to get no sound when first turning on the TV or changing inputs (cable box to Netflix, even going from one video to another on YouTube!). I figured out that if I cycle thru the inputs on the remote to get back to HDMI-ARC, the sound comes back. Not happy. I have cable box, and Sony 4K player run to TCL/Roku TV (Series 6) via HDMI and out from TV via HDMI-ARC to the Vizio soundbar ARC input. Any help appreciated.