My "set up" settings won't stay set, particularly on "Output terminals". When I want to send the audio 'out' to my big stereo I go to menu, then 'output terminals', then "Audio out", and I set to "Variable" so I can hear sound through my big stereo system, but once I turn off the TV, the setting automatically reset to "fixed", where the audio comes out of the tv speakers. How can I keep the setting permanently set? Thank you, Mark 203 996 5978