I dont know if yours is falls under this but if headlight and all lights come on with key, check the switch/pcb in handlebar (right side) make sure it is working, also check fuse/breaker under the seat - should be between charge & battery, battery & EHC. Let us know what you find. There is a good youtube video on diagnosis for the handlebar PCB that will help.
If yours is the "harley style" switches then check the run/start/stop (also in right hand side) and sounds like it might be in the run/stop button (rocker switch).
Let us know what you find.