With out a screen you will have to rely on the front display. Press either the source or home button and then arrow down. If the display shows what source you're on then you're golden. Other wise you will have to memorize the position of the sources and navigate by button pushes, or hookup a cheap monitor. Happy hunting.
Watched this last night, redbox rental, and agree, fantastic PQ and even better AQ. Opie does it again. A real treat for those of us old enough to remember when racing teams could and would try anything to win, like the Tyrrell P34 six wheel car.