Been flying for five years never had this problem? just bought a new controller do not want to mess with it yet until I am 100% sure I’m doing the right thing
Power on the controller and the drone.
Use a paperclip to hold the pair button on the bottom of the drone while it's powered up for several seconds until you see the message "found new Solo" on the controller. Hold down A and B buttons to pair. It will take a few seconds. Usually it will give you two hepatic feedback vibrations before you need to let off the buttons.
The controller and the drone will sync and now be paired.