All systems working as expected with unit. As part of pre-flight after a month of not flying went through complete calibrations and did "Advanced Calibration" for IMU. Accepted Advanced calibration OK. Did "power cycle" as requested and returned to RC calibration checks. All OK. Now here is the problem: Camera WiFi connects OK and can see the Phantom camera view, but the camera gimbal is totally non responsive and the camera just flops around loosely. No remote control at all. Gimbal is as if total failure with no response to control attempts. Did checks on control cables for camera and gimbal and all are secure. Did close inspection of the ribbon cable and all OK. No breaks of disconnects. Have gone through several software reloads and still no gimbal control or power. There is no typical gimbal shakes or humming usually found when camera/gimbal system fails. Gimbal just flops around loosely. Trying to resolve prior to sending to DJI for repair or resolution. Unit is only 6 months old, so still under warranty. Any thoughts or ideas would be welcome.