Unplug the machine, remove the bin and cyclone by lifting the cyclone all the way up, keep going, and eventually it will unclip at the pivot. Remove the panel that the cyclone obscured (a single T15 torx screw). The switch is removed by pressing it down (into the 'on' position) and holding up the yellow button, it will simply slide out. Refitting is a reverse of the above.
Gordon, January 2011
