I have a JVC big screen, model AV-48WP74. When I turn it on whatever channel or input (dvd, vcr) i have on goes to a grey/silver screen after a few seconds. If i go to picture swap where it shows two screens at a time it is ok, and will stay like that, but when i go back to a single channel viewed on the entire screen it does that again. After around 15 minutes it doesn't do it anymore. I was thinking it had to do with warming up, but why would it all of a sudden take forever to warm up. Also, if i shut it off and back on again it does the same thing. I was messing with the remote before this problem started occurring, is there something i need to reset in the Menu? Can you help, please!

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