for the most up-to-date information, rather than YouTube videos from 2019-2022.
If you did use an old, faulty "2.6 repack" and your 3DS shows a black screen with a light blue LED, follow these steps to fix it: Turn off the 3DS. Remove the SD card and insert it into a computer. Download the latest Luma3DS .zip release.
for the easiest, safest, one-click update method.