confusing yamaha rx-v667 problem
i've been happily using a 667 for the last 18 months without problem. all equipment goes through the amp via hdmi but we normally watch tv by bipassing the amp. when the kids are in bed the speakers are then utilised. however, for the past week or so when we bypass we get no sound to the tv. i had thought it was the tv at fault but i have directly connected the sky box and bluray to the tv and it works fine. i then thought that my daughter might have accidentally changed a setting on the amp. after investigation i had no joy so completely reset the unit but am still getting no sound from the tv speakers when bypassing either the sky box or bluray or any of the 6 hdmi inputs. im stumped, all i can now think is that the amp has a fault because while the hdmi output sends a picture, it doesnt seem to send sound? any ideas gratefully received.