Mixer doesn't run (by 2 users)

you can take it apart by removing the pin which is in the shaft that does NOT hold the attachments....... i got mine out with a nail set and a gentle tap or two with a hammer. after you remove that pin the portion that holds the attachments will slide down revealing three more screws and some gearing. if you remove those three screws....... the top will come apart (assuming you have removed the other four screws which are visible when the unit is assembled) and you will see the circuit board.