After a fall Mavic Mini gimbal is going up and down. I've put gimbal from another spare drone and a new flat cable and it's the same problem. On my spare drone, gimbal is OK. Could it be that a new flat cable is faulty, could there be anywhere else a problem or it's a software issue?

I got no warranty, so it's DIY. Also, that spare drone is FCC version and I have CE controller, so I need to fix that CE drone version.

Video of gimbal can be seen here: https://easyupload.io/kf5ppn

Hello there MM drone. I am sorry to read and to know that you are having these issues with your DJI Mavic Mini and thank you for reaching out. Since you are experiencing this issue after a crash. I would recommend for you to contact our DJI Support Team at  https://www.dji.com/support?site=brandsite&from=nav for further assistance. We have a professional team that will do there best to check  the said DJI drone and will give out the best resolution for this issue. Again, I am sorry for the trouble this has caused and thank you.