I recently got my 360 repaired by the service center, and have noticed issues in playing dvd back from it. I ususally use my hd dvd addon to play dvd's and had no problems with it. But lately i would be watching the movie, and suddenly it would stop playing and go the main xbox 360 screen. Any clue why this would be happening.

Another issue i realized is why the audio sound so much better when i use the xbox 360 drive instead of the hd dvd addon to play dvd's.

does the red light come on? could be overheating.

nope no red lights or errors at all. Just goes to the main screen.

Your HDDVD drive has the latest update right?

What latest update, i have been updating everytime microsoft releases an update. Is there anything else i am missing.