hi I need help, I have a nad av 713 5.1 surround digital amp and it is making static and pop noises in both channels and in both speaker sets (A&B) I have tried cleaning the potentiometers and it hadn't helped 😡 also i have tried all the inputs and they have the same problem if anyone have any ideas of the culprit i will be more then happy tor hear
thakns
thakns