Humminbird and navionics blinking gps
I have a Humminbird 987 with a navionics card installed. Lately after a little use, the gps data blinks so color changes from blue to white with no data then stays all white. I can shut off unit and turn it on and it will work for a little while then goes out again. I don't know if t is the gps or card. Unit is 7 years old and not serviced any more. Could also be a bad card. Any suggestions?