Recently bought a used Terrova that has AutoPilot and Universal sonar to replace my Maxxum. I wanted to add CoPilot so I ordered the remote from Amazon and the control board from Minn Kota. Hooked everything up with no problem but when I depress the "Learn" button the receiver does not emit the tone (no sound at all) as described in the instructions in order to program the remote. Contacted MK technical support and walked through everything with him with no luck. MK is sending a new control board but not too hopeful that the one I just received was the cause. I would really appreciate any input you guys may have regarding the issue. Thanks in advance......