All instruments showing dashes

[Chuck - Raymarine - Moderator]

Welcome to the Raymarine Forum Doug,

It's certainly worth verifying that the system has two (no more, no less) termination plugs installed and that they have been installed within the backbone sockets forming the two extreme ends of the SeaTalkng backbone. If so, then attention will need to be directed to the source of instrument data. Please note that the i70 MFIDs are dependent upon an iTC-5 or instrument transducer pods within the backbone, or other instruments within the system. What are each of the currently installed instrument transducers directly connected to?