I've been using http://dl.qj.net/nintendo-ds/homebrew-applications/diagnose.html to debug faulty DSes. I use it to make sure the shoulder buttons aren't stuck, that the touch screen is properly calibrated, and that the other buttons just work. But I don't exactly like using it. It has a long intro screen and the touch screen diagnosis doesn't cover the entire screen area. Is there some newer homebrew that sort of covers this area of diagnosis? It would certainly be nice.