I haven’t used my phantom in a couple of months. I just tried to use it a couple of days ago and when I turned on the remote it just keeps beeping. I tried the hard reset with C1 and C2 and the shutter button then turn off. Wait 5 minutes then power back on. Still doing the same thing. I go to the DJI app and tried the remote calibration but it won’t let me because it says left joy stick is at 100% but when I turn the drone on it doesn’t take off. I can make it fly normal like it should but have to listen to the beeping noise and the app says it’s disconnected and don’t have camera feed. It also says gimbal is disconnected. Can somebody tell me what’s wrong.

Just to verify, has the drone been involved in crash or hard landing? What's the current version of the aircraft, controller and APP?