S1000/s100 says no gps fix

[ubettcha]

My configuration is the course computer is powering the seatalk ng converter and is the only thing that is being used. With just the input from the computer to the converter and output to the gps. I've run it this way since I put it on the boat last season. My first converter was replaced as it was not working. Should I purchase another one and send this one in? If that doesn't cure the issue I'm having what would be the next step?