So I had to watch as two days ago my friend took our phantom over a big lake. I was flying my cinestar at the time and was'nt paying attention to what he was doing. Anyway he said before take-off it had 4 red light flashing some sort of error code? i know 3 lights is bad gps signal but four lights flashing for about 2 minutes(hmm) I told him to cycle the heli (turn it off and on again) but he didnt because it turned green and did the home sequence light. So he took off about 1 min later it was stuck over the middle of the lake with no input for from the controller just hovered there. I quickly landed my cinestar and ran over to see what happened. I took over control. Yep nothing no stick control at all not even gas. I didnt want to turn off controller as it was over the water and if i gained control I at least i would i have some chance of returning it to safety. Then we just watched it ran out of battery and splash down over the lake. Lucky for us it floated enough for us to get a boat and return it. Took it back home took everything apart and dried it out sprayed it wd40 for good luck. But the phantom is dead got the magic white smoke treatment on all four of the motor controller. Dried out the go-pro and lucky it turned back on to my surprise and the fpv stuff still worked. Anyone know what happened? I was using a dx6i with the ar6210 so I know it is a good radio system, just sucks to have hover over the lake with no chance of even catching the **** thing lol.