Chosen Solution

After I had an accident in which my Parrot Bebop fell about 75 feet, I could not turn the drone on again. When I pressed the rear light to start the drone, first the light blinked green and then turned red. I at first thought the problem was one motor that had been damaged. I replaced the motor in question, but the light still blinked green and turned red. Eventually, I took the drone removing the motors, camera, and gps until there was only the motherboard connected to the battery. Now, I still get the same response. When I press the turn on button the light blinks green and then turns red. Do you have any suggestions for repairing this Parrot Bebop?

This has to do with either Disconnected motor Or disconnected GPS board

i am working on mine right now and it seems that the motor drivers have an open ground or negative, when powering on the motors should activate a few short pulses. my drone does not, but you know guys it would be a !&&* of a lot easier if they would supply a circuit diagram