Rikki & Trident it turned out to be a simple fix for a complicated problem. All that was needed was a reset of the motherboard and I am back in business. It took all of 2 to 3 minutes....if you know what you are doing. I don't know how the motherboard became confused in the first place....so I guess it is not entirely fixed given I don't know the cause.

Trident, the Music XPC use fluid cooling systems and are very very very very very very very quiet and then some. It is definitely my next music computer.