I have had an intermittent electrical fault on my Dyson DC 4 for some time and now it has packed-up completely. I have checked electrical continuity at the switch end of the cable and this is OK. I cannot however work out how to get to the terminal connectors at the electric motor end. I have removed 5 securing screws, but nothing seems to move.
look down on the top of the on/off button - there is a small slot on the inside of the button - push a jewellers screwdriver into the slot - the button release is via a tab, when this is depressed, you can then ease the on/off button out, this will then give access to a screw on the switch which when released will allow you to maintain the switch.
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