I hooked the unit up to the OEM Transducer, nothing, will not read bottom jumps around from 3 ft to 90 ft to 500ft. No image on DI, 200 KHZ or the 83 KHZ Frequency. I bought a Motorguide XI5 and the Humminbird Adapter Cable. Hooked the unit to the XI5 Transducer same thing. I understand on the XI5 I will only get 200 KHZ and or 83 KHZ Images. Called Humminbird I not very happy with their Customer Service, 20 minutes on hold, young girl answered was clueless. The unit passes self test. This happens when boat is not moving at the dock. The water at the dock I know is 5 feet deep and will not register bottom or give images of bottom? Any advice?

