Hello. I have a Panasonic DB80 hooked up to an Onkyo receiver via optical sound. Every 3-5 minutes or so the sound cuts out briefly (1-2 sec.). This happens with all movies and CDs. I don't have HDMI on my receiver. I've tried all the other audio options and have the same issue. Hooking the DVD player up to my TV directly via HDMI, everthing is okay. I have the current firmware as well. I've also tried playing around with all the settings with no luck. I'm about to return it but was hoping someone had some experience with this before. Thanks in advance.