I have had the same problem with my LB12T. Due to the fact that mine is an integral fitting, it is a real heavy lump to try and move in and out of it's location ,- under the kitchen top. I have had three so called ' specialists ' to sort it out and paid their call out charges and first hour's labour charge, and the problem still existed. I bought a new push on/off switch from Ariston Spares, and fitted it myself about two months ago. It has been working fine up until today, but now the darn thing has started playing up again. I have decided that I am not laying out any more money on a dead horse. I am now considering Miele or Bosch because I really believe they are worth the extra money. Some Miele machines come with either 5 year or 10 year guarantees too. That has to be a bonus worth having.
BB, August 2008