Played a CD today - no sound. Different CD - no sound. Switched player off and on - no sound. Switched off and left for 15 minutes - no sound. Swapped input sockets on NAC202 - no sound. Checked Forum for reset procedure and found one from NeilS: switch off then switch on holding the stop button - SOUND!!
Probably relief but sounds better than ever!
It has been mentioned in the past that a full power cycle, with a few minutes rest, can results in an SQ improvement. But then again its also been said that a power cycle can result in blowing something
In my case the power cycle had no effect, it was the reset that sorted it.