I'm pretty sure black and white screens are different. (except the color of courseblack/white = no differenceee!
for example, put a nds rom not patched (or a nds homebrew with no loader) on a supercard or whatever, you'll probably get white screens, if it runs, but the thing that runs don't work or make the program crash, it'll probably be black screens. (to be confirmed)
And it stll says "Could not read the data. turn off the power and reinsert DS card."
