To get the screen to work remotely and see your guide like you would through coax like the 722 go to menu -> settings-> Shared view and turn it on. It will fix alot of peoples 2nd tv where a screen is on and no menu just black box.
Thanks! I just enabled that so I hope it works. There is nothing more frustrating than wanting to watch a few minutes of TV before bed, and having it be an ordeal.