hi, there, i hope someone can help - my recently aquired nad 3130 gives a loud hum/buzz through the right speaker channel when i flick the selector to phono (my project record deck is powered up and plugged in)... no music comes out of this speaker either... do u reckon it is the amp or the turntable that is at fault...?? also, when i touch the earth the sound halves in volume... Thanks for ur help Ethan