I tried those suggestions and no luck. Maybe I'm bad luck cause I've tried 3 boxes and they all do the same. Purple light, box reboots, lose my sync. Ive tried different inputs, cables, methods of connections (i.e. Xbox to reciever to sync box to tv, or xbox to sync box to reciever to tv, etc etx) after 8 months, I believe I've tried everything. But seeing as other people don't have the same issue.... I'm at a loss.
Really bums me out cause when this works..... I love it.