Which OS and which DVD player software you are using.
In the meantime, VLC Player should suffice until we sort this out.
I can see the pictures Ok but get no sound when I try to play a DVD on my HP Compaq laptop. I can hear music Ok so presume it's nothign to do with the sound card. I've checked the regional setting for the DVD and the laptop and they are both the same.
any ideas please?