I too have trouble playing back Commercial DVD's. DVD's that I've made on ANOTHER recorder for home movies, do play okay, just not professional DVD's. I used a Maxell DVD cleaner disk (it has a tiny brush on the playback side to wipe off dust from the pickup. It didn't help. Unplugging AC didn't help either. Hardly use this player/recorder and am VERY DISAPPOINTED in its lack of performance! An Insignia DVD recorder outshines this unit (except for the lack of HDMI output). Sorry I purchase it. Normally, Samsung is very high quality (I have TWO Samsung LCD tv's).