Vizio sb3821-c6 stuck in demo mode

SOURCE: Demo Mode

press and hold the mode button for more than five seconds. Then use the knob to scroll to "Default". This sets the stove to normal operation.

SOURCE: Stuck in Demo Mode

If you can plug the c550 into your computer and pull it up as a drive, you should see a "Demo" folder. Delete this folder, and it MAY fix your unit. If your computer will not see the unit, you will need to send it in for repair. FYI, I am an employee at Garmin, and we always go out of our way to help in any way we can without sending it in for repair. Garmin gives us more latitude to help the customer than any other company I've ever worked for. We don't do anything "just for more money" We don't work on commission, we get nothing out of making the customer pay for a repair.

SOURCE: Aiwa CDC-X504Mp stuck in demo mode

This recently happened to my Sony, maybe it will help u

If this cd player has a removal fascia then try..

Carefully inspect the the electrical contacts on the fasica and the cd player. If it has got dirt on them then CAREFULLY CAREFULLY clean with cotton swab dabbed in cleaning Alcohol.

SOURCE: How do I turn off Demo mode on Archos 5

Click Tools -> Settings -> Firmware and Plug-Ins and click stop demo Firmware (Mine is not activated and this may not be there).

SOURCE: stuck in demo

I had the same issue and was about to give up.
cleaning, key combos and such didn't work out.

Solved the dirty way, as described some comments above:

"Just took the faceplate from the "push-menu" button and hit it against a hard surface [not too hard but not too soft hits] and thats it, it worked again."

ah, the good manners!