Ok, I now know.
We didn't get it fixed.
We got it replaced.
Did they move the existing data/installed system over tot he new one, or was it "built from scratch?"
If the latter, I'd check for magnets again, because it's either that, you're doing something unwise to your computer, or you have really rotten luck!
If they copied ANYTHING over from the old system the problem might very well have been brought over to the new computer, too....