Is the video connected to the TV by a scart lead? If so make sure that both scart plugs (one in the TV and the other in the back of the video player) are seated fully and squarely into the sockets. If a scart plug is not seated fully on one side, either the sound or picture can be lost. Another thing to try is a video head cleaner tape. If your video is not connected by a scart lead, the only other thing I can think of is re - tuning your video to the TV channel as per instruction manual. Good Luck