Denon Dvd Changers Rare Capacity Sacd Changer I Have A Denon DVD Player That Is 6 Years Old, And Most Dvd's It Will Play, But Not All Dvd's Any Comments?

I Have a Denon DVD Player that is 6 years old, and most dvd's it will play, but not all dvd's Any Comments? - denon dvd changers rare capacity sacd changer

Most DVD's Will play, but it seems to have problems that some double-sided discs. If you use the disc on other DVD players that play well. I know it is not difficult. Thanks