My 500C display turned off mid ride and the bike died. I was able to charge the battery like normal to a full 57V. I see 57V using a multimeter at the cable going into the display. So seems the battery harness is fine. Thought for sure it was just a dead display but I ordered a new one, and that one won’t turn on at all either? Could it be something in the battery not allowing a current load to the controller display? Like a bad BMS?