Good afternoon, I have an ultrex with the built in mega DI transducer. I am having a problem getting my 2d sonar to work correctly on my Helix 10 it just shows a bunch of lines and sometimes just a white screen, the Mega Di is working fine. I switched the unit out with the one that is located at the driver's console and the 2d worked so I do not think it is the unit. Has anyone encountered this problem or have any idea what could be wrong? Thank you all for your help