MN MODEL MN90 D90 RC CAR suddenly stopped working during off-road driving?

Answer: The sudden stop of MN MODEL MN90 D90 RC CAR may be due to motor burnout, battery exhaustion, circuit board short circuit or burnout. You need to check whether the motor is damaged and replace it with a new one; make sure the battery is sufficient; check whether the circuit board is short-circuited or burned, and repair or replace it.