Problems with Setting up TV and DVD. Default TV 'scene' setting to AV1 won't let me see the TV. Even though HDMI/DVI setting is not being used Receiver see it in DVI 'scene' setting. Why? Don't know. Problems with actually setting up the four 'scene' settings. Once configured How do you save them? I hit return and nothing is saved.......All I get is NO TV in 'scene' button with the default at AV1. How Do I change the default?