i bought a used JVC Xv511bk from a thrift store for $30 a few days ago, thinking maybe ill get lucky and itll work. i figured it was worth a shot. well i was wrong. the problem with it is there is a good video feed, but i am not getting any sound at all. it is hooked up to my receiver using a S-video and Digital coax audio. all the cables are connected properly, and ive tried hooking up a regular component audio, as well as the fiber optic digital audio cable as well, and nothing works. anyone have any ideas as to what might be wrong? thanks