I recieved my new APM 2 week ago and havn't been able to fly with it yet. I followed the instructions and it work very well with 2.28 and HIl version. The Mission Planner was 1.1.50. Once I upgraded the Mission Planner 1.1.51 and up it started to act funny with just usb being plugged in. The mission planner would get a no Mavlink heartbeat and also terminal would be stuck on Init Gyro. I would let it sit for couple of hours without power and reconnect. Everything was working for 5 mintues and with the board still on the table the gyro stopped working again. I tired to go back older firmware and mission planner with no success. Even updated the ppm decoder with the 2.26 hex file and still no success. The APM 2 still works in HIL firmware without any problems. I have followed many other forums that had similar problems however none where a fix. I tried arduino ide 2.30 firmware and mission planner version. I turned on the #define APM2 code line to make sure the it was correct. I can't get the Init Gyro to pass. I don't want to removed the daughter board and if I need to I will send it back to get fixed. I also have tried the flashcard removal and resets and erase with no luck. I havn't even flown the board and it allready bad. Any help would be nice.