Idontwannaspendsolongonana

I changed the braid plate of a car during an arc pro race and then the car became dead, tried changing back the old braid plate, a new braid plate and reconnecting the controller and the car still doesn't work, How am I supposed to fix this?

Thanks guys, but I tried those ways and it still didn't work. The behavior of the controller LED is a bit odd and I don't think it's mentioned in the guidebook, when turned on, the LED on the controller blinks once and go off permanently. That happens even when the PB is turned off. I also tried pairing the controller again, but seems the PB can can't detect that controller, the green light on the PB keeps flashing and then goes off. The batteries I am using is a completely new set of alkaline AA batteries, that set of batteries works well in other two controllers

Just got the Sunset Speedway set 2 days ago, one of the controllers didn't work just after one practice race and one pace car race. When the controller is turned on, the LED flashes and go off immediately and it is unable to connect to power base. Tried fitting new battery but still the same. Is there any hope to fix it?