It doesn't have an internal filter. Think about it for a minute - if a filter or pump was blocked it wouldn't drain out, but you say it does drain. The problem is the motor not starting. First check the lid switch is working by lifting the lid up & down about 2 inches. You should hear the switch click on & off. If switch is working then you could have a bad timer, damaged wire going down to motor, fault in motor or bad starting capacitor.
Lincoln Appliance NZ, June 2011