Check whether the circuit breaker has tripped.
If the circuit breaker has not tripped, disconnect the appliance from the power supply for approx. 1 minute.
If the circuit breaker has tripped:
Switch on the relevant circuit breaker
Replace the fine-wire fuse or
Switch on the residual current device
If, after resetting/replacing the circuit breaker or the residual current device, the appliance will still not switch on, contact a qualified electrician or the Miele Customer Service Department.