Hi
Exactly the same thing happened to me. I took the mixer to a Kenwood approved mender, but he couldn't fix it as Kenwood don't make parts for a mixer which is so old. I haven't given up and am trawling through the internet to find an answer. I really, really don't want to buy a new machine as it will never be as good. I was told the motor had gone on it. Hope this helps - don't give up and break your heart!!
SJ, December 2009