Motor dysfunction Rad Rhino ST!

[JohnnyH]

Rad Rhino ST1 2 1/2 years old 5000km on the clock.
I was out riding this morning, when suddenly there came a clunk clunk clunk noise from the back wheel/motor, followed by a complete lack of motor power. I could still pedal it (difficult as the Rhino is so heavy) and the display was still on. I checked the couplings and they are all connected.
I have just bought an Eggrider to replace a faulty display controller
Any ideas what is wrong and how I can rectify it?
Thanks!!

[inoxa]

possibly your motor gears have crumbled inside the housing. 

do you hear any noise from the motor?
any wattage reading on the LCD?