Thank you so much for your helpful reply, I havent looked at the links etc yet.
Just wanted to say that I have had another go at the switch and I have 2 other Dysons to look as an example. I have jiggled things about then put it back together and switched on and it has sizzled again. Then tried again and then switched it on and it is as dead as a dodo.
It is so frustrating. I rang the local Dyson man and he wants about £20 to fix the switch and I am afraid, being on a tight budget, I really want to try and do it myself.
When it was playing up and wiggling the cable, got it going again then it sizzled and smoked a little and cut out, which connection would that have been, a blue or brown? By the way, the grey cover, does that have to go back a specific way because there is a sticking out piece at the back??
I think I had best leave it for now and pack up or I shall drive myself mad! Going to read your reply now ClassicDysonDealer and I really appreciate your reply. Here goes .......