I'm sorry, but with this limited amount of information, I have to start from the bottom. Have you checked your connections and made sure that either the television or cable box isn't on "mute"?
I own a Samsung DLP (model HLS5065WX/XAA). The picture is fine, but the audio does not. In fact, there is no sound. The only device connected to the TV is a cable box. I am looking for some advice. Please help with the issue.