Hi, I have a problem with my navigation. I followed the electrical diagram and the nav fires up I have the fan spinning but in default mode only on the front on high my screen doesnt turn on, only the small LCD showing me ext 50 51. I have a 3 way cable for voice cdc and telephone, but I putted the voice optic into the navigation and the others in the cdc and the telephone respectivelly. Could that be the problem? Any suggests are welcome, tomorrow im going to check the voltages on the pins and if something im going to give some update.

 

CHeck the connections marked DC+ and DC- on CN200 on the NAV drive as shown here https://drive.google.com/open?id=0B3...jItLWhvUDdpY0U
COuld be either not connected correctly or polarity reversed.

Ben