In the past I've only had SI models so this problem had me puzzled. Have a Helix 10 MDI G4N on bow connected to a Helix 10 MSI G4N at console first time out yesterday checking the units. The networking seems ok but I could never get a depth reading on the MDI and no DI. At random times it would show erroneous depths way over the actual depth for a few seconds and then nothing. I could select the console sonar as source and view that but not from the bow. Tried resetting several times without success and checked connections. Suspect it may be a bad transducer out of the box? Transducer is mounted externally on Ultrex TM.