I crashed my P3A and had to replace 1 motor. Ok, everything responds, lights, beeps, IMU calibration, camera, etc. but the motors won't start and I get the ESC ERROR message asking me to restart the aircraft. I have read all that I can read in the blogs and the end result is "replace the motherboard" but I want ensure that I fully understand what I should be checking as not to overlook any option besides dropping 500.00 for a new board, for instance what about the ESC units that are attached to each motor? Is it possible that there is damage to one of them and if so is there a way to test and determine their condition? Any help would be greatly appreciated. All of my firmware is up to date if that helps Thanks in advance.