Ya I'm having that kind of problem right now and I deleted the theme folders and files from the SD card but I still get a black blank screen at startup does anyone know how to fix this at all?
I did the drag and drop part of the supernova sun mod and it keeps having a display error right before starting the normal game play at the begining. Can someone help me please? and P.S. this is for my Pokemon ultra sun 3ds game cartridge.