AND - vacuum repair is a total scam-ola. They contain 1) an electric motor connected to 2) a blower. They also have to be leak-tight. That's about it. There are very few circuits in a vacuum, and with a multi-meter, you should be able to figure out what is going on in any of them.
All that to say, the Mrs. was shocked to see her vacuum flash blue and let out smoke (pro tip- never let the smoke out of electronics, it cannot be put back in, and it makes them stop working; it's pure magic). I looked it over, and sure enough, the REALLY TINY AND CHEAP switch (buried under a clever-looking plastic mechanism) had blown up. It was a teeny slider switch, rated to 11A at 120V. It looked like it should not have been rated above 1A, it was so chintzy. Time passes, I go to Ace, get the best-fitting heavy-duty switch I can find, drill a hole in the decorative case where the switch should go, wire her up, and hey presto - an Electrolux with a retro-modern nickel-plated toggle switch. It has a very crisp snap to it, and the vacuum works like a champ.
It's very modern.