Why won't Vizio E390i-A1 TV respond to on-board control buttons?
I have a Vizio model E390i-A1 TV that has performed flawlessly for five years. Recently it suddenly would not respond to any of the control buttons on the TV or on the remote. I have power-cycled the TV multiple times as described on vizio.com and after each cycle the TV will turn on and act norm for 5-10 minutes or so, but then, while still operating as initially set, the TV will stop responding to any button again. In fact, I can’t even turn it off without unplugging the unit!