Keith, try running you genset in conventional only. Turn off/unplug the Legacy. Verify the forward, reverse works so we know the motherboard and driver board (DCDS)and connections are sat. If that works sat then the focus will need to be on radio board (R4LC) and connections. I have worked on one of these they are a bit of a challenge. For me a broken wire/conductor between R4LC and motherboard was causing similar issues.