Same here:  I got sent a new Taillight - It didn't resolve the issue. I get Error Code 25. No display except Error 25. Turn on lights - it turns on Display & PAS & Throttle work. Turn off lights - No PAS or Throttle. Brand New Bike - straight out of the box like this. Only 15 Miles. I have gone through all the electrical checklists - no luck. Hope someone can get this resolved - very frustrating. Have sent RadPower another email for more resolution on this.