21 flights with success. Then a bad battery dropped my FC40 out of the sky like a falling rock. Classic, I said, "Oh, this isn't going to be good." It bounced, Zenmuse gimbal broke, and otherwise all was good. I have fixed the gimbal, re-connected it and it works fine with my GoPro3. I have checked all external wires and connections and they appear to be re-attached correctly. I prepared to take the FC40 out for a test flight, but I can't get it to connect to the GPS in the sky. With controller on, I plug in battery, and both controller toggles are toggled up - GPS mode. All I get is a constant flashing yellow light. I have turned things on, off, took it to different fields to try to get a different GPS signal, and with no luck. Slow flashing yellow light. When I toggle the right toggle downward, I get a fast multi flash of yellow. But no red, no green...nothing. Can you help me with a little trouble shooting? Could there be a connection that I have missed, or something to check that I'm not seeing? I didn't build this so I'm not sure where the GPS antenna, wiring, or other options are located. Thanks for any help you might be able to assist me with. I'm in the nation of Panama where there are NO PARTS.... so I'm 10 days out in shipping on anything I need to buy. Thought I'd try the forum first before sending this thing up to the USA for troubleshooting. THANKS!