hi, there are a whole lot of things that could have gone wrong with your hellicopter. i only own one hellicopter but i can try my best to help you. what i would do is check all of your wire conections and the battery charger and all of the basics. the second choice is to go to your local hobby shop and ask them about the problem, and don't forget to bring your helli with you. usualy seeing something in person will help the person fix the problem. make sure the person your talking to has experience with rc hellicopters. i hope your problem is solved soon. Austin.