Hi guys. My APM is not working and I wanted to ask you guys about it while waiting to hear back from 3DR support. I have an APM 2.0 with built-in GPS. It has flown 4 or 5 times with each each flight having greater success (ArduPlane firmware). The previous couple flights were almost perfect. However, last weekend I could not get a GPS lock. After waiting several minutes I tried pressing the reset button. Then after waiting about 20 minutes, I unplugged the UBEC power to reboot the APM. (UBEC with a separate battery is powering the APM and the BEC/ESC is powering the servos.) Upon turning the APM back on, nothing happened. No lights, nothing. I checked the connections and the UBEC and it was correct/working. At home I plugged the APM into the computer via USB, and the lights did come on (and Windows' Device Manager saw it), but failed to connect in Mission Planner. There was an error message, "No Heartbeat Packets Received".
I've set this unit up by the book and been very careful to have it correctly powered. Nothing unusual that I know of happened to cause this.
Is there anything I can check or do to fix this?