[CA] E120W Radar problems.

We've installed a good working E120W with the appropriate VCM 100 power supply, cables and HD open array and we can't get the MFD to connect. It flashes the note. "No Sea Talk HS Connection detected on unit." Someone said we might have the wrong black crossover? Are there two types?

VCM 100 was tested and is producing 42 volts.

Thanks

Todd