when turning on phantom 3 standard everything turns on and connects properly and app says ready to fly, then the gimbal starts to shake violently and flight screen says aircraft disconnected, this prosses will repeat over and over again until the gimbal just continues to shake without stopping. the gimbal will be very very hot to touch. gimbal status says overload

Sorry for the difficulties with the gimbal. Please double check whether the 8-pin cable between the gimbal and the aircraft is loosen, if not, please cool down the aircraft for 30 minutes, then place the drone in the level surface to perform he IMU calibration, then the gimbal calibration. If the issue persists, it is recommended to send in the drone for the evaluation, please start a ticket here: https://repair.dji.com/repair/index?site=brandsite&from=nav