Recently put together a 3 axis gimbal and when I plug a battery in, neither of the motors turn on. My sensors are lit up, but no movement form the motors whatsoever. I read maybe it could be because the board doesn't have any software loaded? Or maybe I have a bad or not official board?
You need to connect the GUI and do the basic setup and then tuning. Motors will not get power before sensor is calibrated and gimbal will not work right before the complete setup is performed.