[CA] [CA11] GPS signal to MFD and Autopilot not working

[Chuck - Raymarine - Moderator]

Welcome to the Raymarine Forum Jim,

One of the most common causes for this issue is an underpowered SeaTalk bus caused by undercharged batteries and/or powering the SeaTalk bus via the MFD's SeaTalk socket alone (the latter was exclusively intended to power a SeaTalk bus consisting of a GPS sensor alone). Accordingly, the first thing to try is ensuring that the vessel's batteries are fully charged. After doing so and while still connected to shore power / charging system switch ALL of the electronics power circuits on. Should the problem persist, then it would indicate a failure within one or more of the system's devices which have been interfaced to the SeaTalk bus. Please click here to view a FAQ addressing this subject and how to identify the faulty device(s).