Well I think I fried mine ! I was hooking up a v2 vmu to a v1 controller and smoked it. The controller works it flys in atti fine. But won't recognize the gps.I think they pretty hard to fry atleast from my experience. I'm really good at frying stuff and have not managed to fry one yet. Might sound pretty basic but do you think your trims are all set to 0?