As for me, im used to using something called Daniusoft dvd ripper to backup dvds to computer or other devices like iPad/iPod/iPhone/zune/Blackberry...

As a result, in the first place i can watching dvd movies any time and any place, in the second place this can prevent losting or damaging dvd disc.

If it doesnt read any kind of dvd discs at all it only means you have been rip off. It happened to my sony dvd player that I bought from this website. I tested it and it only reads cd or audio cd. Good thing my couzin fixes electronics, He checked on the lens and it turned out that the lens has been replaced with an audio/cd lens like the one we use for our car stereo. Too bad!!!