I have recently purchased an LG DVD Home Cinema System (Model: LX-D5230), and everything has been working all right so far. Then I hired a film out from Blockbusters (Shaun of the Dead). When I played the DVD, the sound was not working properly. You can hear background noise quite well, but you can hardly hear the actors actaully speaking. I think that film has Dolby-Digital 5.1 or something. Not sure if it's anything to do with the problem. Any help would be appreciated.