I run a 1197CX on my dash and a 958Ci on the bow. They are linked. Whenever I step on the on button on my 101 Fortrex I get lines of intereference running horozontially on the screen and all my depths disappear. When I disengage the motor the inteference goes away. There is no interference on the 1197. I have tried all the fixes from Minn Kota ( I am a Minn Kota Tech) and have had no sucess. Is there a software upgrade available that would help or do you have any suggestions or cures. Many thanks.