I had the same exact issue with my 16 Radrover on two separate occasions with a 30 maintain error and it dropping power randomly after 5-30 minutes with a blank LCD screen. Both times it took a new controller to fix. Also, Rad Power Bikes sent me a new controller, LCD screen, and wiring harness to help troubleshoot the issues. Just the new controller fixed the issue, zero change with new wiring harness, and the new LCD make the issue worse. The new LCD screen would drop power immediately after applying throttle/PAS. I've been working fine for +3 years since with +3500 miles.