Need a little help people. Tomorrow I'm going to go look at a used P3A. The person selling it says that it flies but will not connect to the DJI Go app. The motors start and stop but no camera feed. I've googled some solution. Some theories were that it might have a bad USB board, android USB software is clashing with the Controller and app or the bird/controller might need an update. I'd like to know what a solution may be if there is one before I go look at it. All and any help is appreciated.