I have tri d everything and it still dosn’t Work. It was completely charged this morning and usually lasts all day but turned off on its own after only 3 hours. Now I can’t turn it back on. I plugged it in and no lights appear. The power button does not work, even after I hold the mute button longer than 10 seconds. I have checked the charging port and it appears fine and unobstructed. What should I do next? Thank you