I have a older yamaha surround receiver also with a problem. it sounds fine on cd players, but the sound cuts out when hooked up to my hp all in one pc in the livingroom. I haven't used the yamaha in a few months. the nad ended up going in the livingroom instead. I wonder what is making the sound cut on when I hook the 3.5mm cable with the red and white cables on it. the nad has no problem playing sound through the headphone port. the yamaha will work fine with iphone hooked up to it using the 3.5mm plug but won't on the pc.