When trouble shooting sometimes chips, caps or resistors can get much hotter than surrounds parts. It can let you know to inspect that part for replacement.
Sure don’t grab leads with your fingers but sometimes you can tell something like a voltage regulator is malfunctioning because it just gets really hot.
I mean you can just use an IR camera but most people don’t have one.











I’ve seen a local installation of the tiles. I asked the contractor all about them as they went in. They are real.