We will like to know if a disc doesn't play at all or if there is another issue.
We would appreciate if you can test playing the disc in another device to ensure that the issue is not related to your player. A few things to keep in mind:
If you are playing a video disc in a computer, please make sure that your computer has a Video player installed. It will be great if you can play a good video DVD on your computer to ensure that you have a good platform.
Certain international countries (outside the USA) use PAL format DVD player. If you are have NTSC format DVD disc, it wouldn't play in PAL format DVD player.