Hitachi Roku TV 55R80 while watching TV over Antenna screen will change back and forth from full screen to channel guide and back. This is driving me crazy. You cant watch a show without it changing back and forth between full screen and channel guide overlay on screen. Whats funny about it is that it only happens on a few channels but it only happens for over the air tv channels. I wonder if its something to do with the tv guide program..
You may be right that it could involve the TV guide program. In any case it would be an internal fault of the TV. Make sure that the TV firmware is up to date and then contact Hitachi. Hope it's under warranty.