USB PWD- No Connection

As I posted recently I have lost my ability to connect my PWD via USB to my Mini. MIDI recognizes the PSA DAC when I connect the cable but no music from any player nor streaming. I think it’s a Mini problem, I borrowed a cheap earbud DAC but it does not play either, again MIDI recognizes it (works on my win laptop). All ports work on all my other devices, eg, mouse, iPad.

I have had this intermittently for several yrs now, eventually it reconnects for no apparent reason. Does anyone have an idea why USB ports which otherwise work will not output music ? I’m not comfortable reinstalling the driver.