After pushing and prodding at my defunct Dyson DC04 switch for a while I found it remarkably simple
Firstly - gently pry off the (usually yellow) plastic push on-off button - slip a thin blade e.g. a small table knife down the flat side off the on-off button (if it breaks the retaining tab, as mine did, check the Web for spares suppliers (not Dyson!) - they sell the switches, housings and push-buttons seperately for reasonable prices)
The removal reveals a torx-type head (recess star) self-tapping screw
Remove the screw and you can then pull up the switch housing
and gain access to the switch and cable ends
Might be a good idea to make a sketch of the wiring arrangement before further dismantling
Hope this helps.
From: Greg
(I belive that if a machine has been assembled then it should always be possible to dis-assemble it. Manufacturers make it simpler and cheaper for themselves to produce and harder for us to avoid throwing them away if something relatively simple goes wrong)
Greg Williams, April 2008
