how can i fix my anthony worrall thompson KM1 professiona food mixer?

i own an anthomy an worrall thompson KM1 professional food mixer that worked fine the last time it was used. on bringing it out again for use, the lights or indicators shows there is power but the motor is not turning.
there is no physical sign of damage inside when i opened it up.its controls are mostly elctronics and the circuit diagram is not included in the accompany manual.can anyone pls assist