Okay the 603 model has a lid switch mounted on the right hand edge of top deck. On the right side edge inside of the lid you will see a bump in the plastic. That is the activator for the switch so when lid is closed that bump will be right next to where you will find the switch. Take out the 2 screws at the front edge of the deck (under the plastic stopper) lift the deck up and look for the switch held in by one screw. 2 wires run along the side and in to the back panel. Make sure all power is off before starting work. Unplug it from wall is best.
Lincoln Appliance NZ, March 2014