I managed to unbrick the 3DS, but now I want to sell it to one friend, so I would like to uninstall the ARM9, and leave all on factory default but... My N3DSXL 9.2.0-20U only boots when boot.firm (luma 7.1) is in the MicroSD. So I tried to use SafeArm9Installer to uninstall the ARM9, but i cannot start it from boot, because with homebrew i keeps getting Red or Black Screen.
Could you give some steps to uninstall the ARM9 having Luma 7.1, It's the only way I can do it otherwise the 3DS won't boot, but in one case i renamed the CTRBOOTMANAGER to boot.firm and i booted from there, but i don't remember the versions of the files I need to use for this, so i would need an Step by Step Guide for this specific case. Any suggestion will be welcome... thanks in advance.
Could you give some steps to uninstall the ARM9 having Luma 7.1, It's the only way I can do it otherwise the 3DS won't boot, but in one case i renamed the CTRBOOTMANAGER to boot.firm and i booted from there, but i don't remember the versions of the files I need to use for this, so i would need an Step by Step Guide for this specific case. Any suggestion will be welcome... thanks in advance.