Hello… My SMART Display had got sound back for over 15 days. What’s more, it out of nowhere quit working this end of the week. It was a hot end of the week in California. I saw that the sound has quit working in this mid year. So I got a hypothesis that it may has to do with temperature. To confirm this, I moved the gadget in a room where I have AC. I kept the gadget before the AC, and sound returned in no time. This hypothesis bodes well, as keeping the gadget off for the time being has worked for me a large portion of the occasions.