Hello I was getting into flying drones and bought a cheerson tiny 117. It flew perfectly fine. I crashed and broke a motor wire so I replaced with some new motors on eBay. I was flying and those motors smoked so I bought new ones that were made for my drone. I soldered them on correctly and when I plug in the battery one motor goes to full throttle. If I arm it then I have control over 3 of the motors except that one, it stays at full throttle no matter what I do. Please help.