Got a Phantom 4 here that was crashed. DJI GO shows a 'Gimbal Roll Error'. Camera still shows video, however it does not move at all (except for a slight up and down motion, very short movement), even on startup. Removed Gimbal from drone and nothing looks damaged inside or out. Re-seated circuit board on top of gimbal. Did an IMU calibration, compass calibration and the auto gimbal calibration. The flat cable looks perfect, but debating on replacing it anyway. Any thoughts? Hate the idea of dropping $3-400 on a new gimbal/cam assembly.