my yam rxv795a is driving me nuts! It has always worked pefectly and has hardly been used really. but now it will not decode any surround sound. by this i mean it will not put out any sound from my player (via optical lead). it won't even do pro logic from skybox (fed via 2 phono cables) The amp will output 2 channel (i.e all surround sound types off) from Sky but as soon as you move it to pro logic it outputs no sound. the dsp program effects like church/stadium etc still work but as soon as you get to pro logic/dd/dts nothing works. (btw, when you turn on dvd player the orange dts sign lights up on amp and can't get it off dts. Can't remember if this is normal or not???) any ideas please??? i have tried: unplugging speakers in turn -switchin impedance selector -tryed a phono lead in the external decoder ports in case they are dirty and they player thinks that there is offboard decoding going on but still am stuck??????????????????? Hellllllllllpppppp!!!!