I have the receiver, the latest firmware that address digital pop and click problems and a USB to 9 pin adapter cable - but after diligent searching I can’t find the button combination required to put the receiver into firmware update mode - and it’s not in the service manual. Any thoughts?
This might help.
Make sure you have the correct (V1 or V2) software for the correct model.View attachment NAD Factory Default and Software Check.pdf
Make sure you have the correct (V1 or V2) software for the correct model.View attachment NAD Factory Default and Software Check.pdf