Thanks for sharing ideas. Fuses were ok.... The next day, I checked connections carefully and found one negative lead attached to the hot side of battery, (not great, but that was the horn issue). Upon connecting the battery again, the dash lit up, and the bike went through a start-up sequence, probably was the Ducati Skyhook Suspension calibrating and inflating. After that, it settled down and handlebar controls (On - Off - Start - Shutdown) worked fine.... All good after that!
