En algún sitio he leído que hay que resetear el AV. Dice así:
"To reboot, turn receiver off by the small on/off button, not the big standby button. While off press the night and pure direct button at the same time and keep holding them with your right hand while pressing the small on/off button with your left. You will see your receiver menu flash. When you see it flash let go of the night and pure direct button and the receiver will reset it self to the radio station 87.50. The receiver's microprocessor has now been set back to factory. Enjoy this info is straight from Denon's Tech support. I had to do this on mine"