did you get a response on this? Lego support is really quite good. Call them and let them know - they will most likely send you new motors free-of-charge. Since the EV-3 is still new, they may want to look at the old ones, but then again, they may not

Brian

On Apr 24, 2015, at 10:38 PM, Tom Marino wrote:

> Hi,
> During today's after school spring robotics program that I am offering to my students, one of the teams was complaining that their program wasn't working for their robot.  What I soon realized that both of their robot's motors were stuck. When I tried to move the motors directly from the EV3 brick, the would both turn a few degrees, but stop (clockwise and counter clockwise).
> Even when I turned off the robot and unplugged the wires, I still was unable to turn either motors by hand.  
> I could not find any help online, so I am hoping one of you has some advice for me before our next after school program in two weeks.
> Thanks,
> Tom Marino
> Sacred Heart Academy Robotics
> 
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