OK!  I seem to be stumped here!  I have multiple DJI Air units, had a crash with my Transtec Laser that cracked the camera housing slightly, now I have black dots on the feed (dust on sensor), so I was going to swap out the Air Unit and when I plug in other units the flight controller does not pickup the control link.  After startup tones it just keeps beeping as if RX was lost.  Green light on Air Unit and I have video feed and can change settings with controller in goggles.  Anyone have any ideas or something I may have missed?  READY...SET...GO!

Also, I forgot to mention, if I plug in the original damaged Air Unit the quad flies fine and everything works....