C-80 stopped displaying Data

[Chuck - Raymarine - Moderator]

Welcome to the Raymarine Forum Pat,

Should the SeaTalk cable be unplugged from the MFD's SeaTalk port, an analog meter may be used to test for data transmission. Should the meter's leads be connected to the cable's plug to test voltage across its data (yellow) and ground (shield) leads, the meter's needle should pulse between +9 & +11VDC.

C-Series Classic MFDs are not designed to support SeaTalkng communications. Should a system feature devices having a SeaTalkng communications interface and devices having a SeaTalk communications interface, then the SeaTalkng backbone must include a SeaTalk to SeaTalkng Converter to support integrating the SeaTalk devices to the SeaTalkng system. Should the problem not be identified, then please add system diagram (a photo of a hand rendered diagram will suffice) to your response to this thread.