Cummins "lost engine com" error message

[folieadeux]

I have the twin Cummins 380QSB engines and Saturday morning up pops a "lost engine com" on my starboard tach and I got NO analog gauges working and nothing showing on the tachs. Engines are running great, chargers are working but no gauges.

Any suggestions from Cummins SmartCraft smart people on where to start.