Shortly after purchasing my first phantom 2 I crashed it into trees and it hit the ground fairly hard. Had to replace the Zenmuse H3-D3 gimbal. I have run the PT2 software calibration, I have attempted the link procedure. Does anyone have a suggestion(s) as to what I should do before taking it in to see if it can be repaired. On start up I get the flashing yellow LED lights ( I believe this indicates non-GPS flying mode), but of course can't calibrate the compass. The front LED lights flash momentarily on start, but go dark afterwards. And cannot start the motors. Any suggestions would be greatly appreciated. Thanks in advance.