Hi, i've made a __simple__ homebrew to check for dead/stuck pixels in your ds/dsl . Basically it displays different colors in both screens, you can change between white/red/green/blue to search for a bad pixel, it will appear as a black dot. The first screen is in spanish, it says to press START to begin the test, once there you can change the colors with A,B,X,Y i hope u find it usefull. url to the file: http://broz.no-ip.info/pub/pixel_tester.nds cheers