Please call Ayre Customer support. Their phone numbers are on their web page below:
https://www.ayre.com/support.htm
My Ayre QB-9 DSD DAC (I no longer own it) stopped working and was returned to Ayre for repairs. Based on your description above, your unit probably needs to be returned for repairs.
https://www.ayre.com/support.htm
My Ayre QB-9 DSD DAC (I no longer own it) stopped working and was returned to Ayre for repairs. Based on your description above, your unit probably needs to be returned for repairs.