I have added a EV-1 autopilot with P70 control head and P60 wind control head to an existing E90W MFD and RS130 gps. If I connect the STng in/out of the MFD all communication between the units fails and nothing shows as connected on the P70. If I remove the E90W from the backbone then the P70 shows communication with the RS130, EV-1 unit, P60 wind. If I connect the E90W to the backbone it will see the RS130 as GPS signals but I get nothing readable in "system diagnostics" for STng on the E90W and all the other communication fails. It looks to me like the issue in within the E90W. Thoughts??
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