Motor runs by itself

One of my students has a motor that runs by itself once the controller is turned on. Turn the controller off and nothing. The motor also can not be used or I can not gain control of it; it just runs over and over. I can not come up with a solution and I know I am probably forgetting something simple but I am at a loss. I have had this problem in the past but have always been able to fix it but I can not remember how it was fixed.

Thanks,

Tim Schneider

Answer: See https://vexforum.com/t/continuous-motor-running/12603/1