i am getting video with my PS3, but no sound. it was working great and just quit one day. i have the digital optical cable going to my surround sound system and HDMI cable going to the TV. i switched out the digital cable to see if that would work. no luck. i have a JVC TV model LT-40X667 and the BOSE 321 GS III home theater system. i also have COX cable if that matters at all. can someone please help?