So basically I've been having the same problem as the OP in this thread: https://gbatemp.net/threads/2ds-wont-boot.433654/ I've been following the guide at https://github.com/Plailect/Guide/wiki/Part-3-(arm9loaderhax) and after installing arm9loaderhax (Section IV), my 2DS gets a black screen when powered on and shuts off after a few seconds. Booting without the SD card causes it to the same but shut off even faster. I've tried multiple SD cards and it doesn't seem to change anything. I can however boot into Luma or hourglass if I delete the config.bin. Anyone have any ideas?