I make same crash with my mavic 2 pro. The gimable are not working and I order used one from china. The part looks defective and I notice that the yaw motor is the part I received is different from the original one. The seller said this is the new version but I don't believe since mavic 2 pro is old model. also when I powered up the drone a sound coming from the yaw motor. please I need any advice then I can stop trying with seller and ask for my money back 
