OK so a friend of mine crashed his quad and instead of trying to fix it just bought another. Told me if I can get it in the air I can have it. OK so I first visually inspected it inside and out, landing gear slightly bent fixed that, gimbal bent pretty bad and whole thing spazzes out when turned on so I removed it, checked the wiring and inside boards everything seems in good shape. Now the problem, when I turn it on it flashes a slow yellow, which is non GPS mode, and when I enter csc command both sticks down and together, it flashes red 5 times and then back to the slow yellow. Did some research and went through some steps as follows, downloaded software assistance, upgraded firmware, calibrated imu ( both basic and advanced calibration), calibrated TX, and calibrated compass rotating horizontally and vertically. All these steps went smoothly all the parameters are within the range they are suppose to be. However same result on motor start up. If any one has any idea of what I can do your help would be greatly appreciated. Also I already sent out an email to dji, but there customer service , so far, is not the great.