I had put on prop guards which I never used once I got the hang of flying and when I removed them I reused the long screws and damaged the windings on the motors. Each of the motors would stutter when I tried to start them. I replaced each of the motors and now I can't get them to run. I have recalibrated everything, nothing. There are no chimes on power up which may indicate something, the GPS plug seems secure, I'd do notice the camera gimbal moves a little when I move the joysticks. I'm at a complete loss And DJI support is worthless. Any help would be greatly appreciated. Scott.