crwdns2890332:0Why won't it turn oncrwdne2890332:0My ninja bullet suffered from the same problem. The safety mechanism was slowly failing. I fixed it by applying some thick 3M tape to the switches inside, but you could probably also just bend the contacts with a pliers. I found the ninja bullet is designed to be pretty easy to service and took about 20 min. Blender is working great now!