Magnovox--)How to disable Demo mode
To disable the Demo mode, perform the following:
Turn on the TV.
Simultaneously hold down the Vol+ and Vol- buttons on the front of the TV. Do not use the remote control.
Hold for about 6 seconds
Certain model TVs may turn off, others will not. But in either case, the Demo mode should be disabled.
All should be well after these steps have been followed.