my yaw motor was dead so I replaced the yaw motor twice both new! I still get this when I turn it ON. it shakes to left and right and a buzz sound at the beginning. I have no idea what to do! please suggest something if you can helpbelow is the link to the video of my drone
https://streamable.com/vngeh

This might Help:

Hi, we're sorry for the inconvenience. For the damaged drones, we would recommend sending the unit to our facility as we're not encouraging our customers to fix the drone by their end due to warranty avoidance. However, if you would like to get help with the problem of your aircraft, you may also send the unit to one of our recommended repair services to have them your drone and fix the gimbal. For further details, you may see the link below. We do appreciate your understanding.

https://www.dji.com/service/repair/centers