Since my last post I contacted Zaon via their on line email. I exchanged two informational emails with Daniel who then suggested I send them my unit. Within a week I had the unit back and the service receipt stated "swapped board, traffic tested".

I flew today with the unit and it appears to be back to working normally again. My only question is I could not verify some of the traffic the unit was displaying so I will have to continue to check that part of the operation.

But the main issue is corrected, the unit is displaying traffic on my 496 again.