I have a Mavic Air 1 drone that lost connection with the controller, and I was told that I needed to replace the board. I bought a crashed Mavic Air 1 from a friend and swapped out the board. Now, I'm having issues with activation. I need assistance in resolving this matter.

Hi, TUPALE. Sorry about the trouble. May I know what country are you currently located in? When it comes to scenarios like this, we suggest sending the drone to our facility for repair. You can contact our DJI Support for assistance here: https://www.dji.com/support. Have a great day ahead.