It all worked last fall, but this spring the MFD will not see the NMEA backbone and only reports Bus OFF. There is power to the backbone. I have even reduced the backbone so that there is only the power connection and the feed back to the MFD.
Before I fired it up this spring I did do the software update, don't know if that is the cause of my problem.
Have done all of the diagnostics I can think of, all suggestions would be appreciated.
Ed