I have a 4P4 that was crashed, I am having two issues that I’m not sure on how to resolve. First issue is upon powering up the drone the gimbal/camera moves up and down constantly., I assume it is trying to calibrate itself? Second, I get a battery error that says a cell is disconnected?? Anyone know how to resolve either of these problems? Thanks for any and all input.

Hello there Stymie. I am sorry to know that you are having this issue with your DJI Phantom 4 Pro after a crash and thank you for reaching out. Since there was a crash that happened before and this unfortunate event happened I would recommend you to contact our DJI support team at https://www.dji.com/support?site=brandsite&from=nav for further assistance and for us to check the said drone thoroughly. Just a reminder that  DJI do not recommend doing a DIY in fixing the said DJI drone to avoid further damaging the said unit. Again I am sorry for the trouble and thank you for your understanding.