I followed this guide:
https://gbatemp.net/threads/tutorial-updating-from-rxtools-to-luma3ds.427735/
Now when I turn on my 3ds, I get a black screen after it flashes red.
https://gbatemp.net/threads/tutorial-updating-from-rxtools-to-luma3ds.427735/
Now when I turn on my 3ds, I get a black screen after it flashes red.