This may have already been suggested, but at this point if it's something from your electrical wiring in your house it may be too late for this current Dell. The next one, I would try plugging in at Brett the Vet's or The Lovely Emily or the local goddamned library. Anywhere but on your street. My husband has been listening to this saga as I shout it out in "WTF!" tone, and he said, "Either she has the worst luck in history and a lot of old appliances going at the same time, or there's something seriously wrong with the electrical system in her house."

Lots of hugs and soothing cuddles, hun, I'm SO SORRY.