New 3DS softbricked after old Luma 7.1 update attempt - blue light flashes then shuts off
(First of all, I'm Spanish, and if something's written wrong, I hope you understand, I don't know much English).
Hello, Everyone,
I found an New 3DS that came already hacked with Luma3DS 7.1 and FBI 2.4.1. (Im not sure if the last number was 1) I wanted to update everything, so I took out the SD card, copied the new Luma and FBI files to it on my PC, and also installed Nimbus for online play. FBI updated successfully and I used Remote Install to download and play some games.
But Luma wouldn't update. A video tutorial said that to finish applying the Luma update I needed to copy boot.firm to the NAND (And I'm pretty sure that was the problem). I did that, turned off the console, and when I tried to turn it back on to check the Luma menu... it just shows the blue power light for a second and then completely turns off.
I've tried many things from different guides and tutorials
Removed the battery, waited, reinserted
Cleaned SD pins
Formatted SD card multiple times
Used fresh latest Luma boot.firm on SD root
Tried SD with only boot.firm
Tried GodMode9.firm renamed as boot.firm
Used old backup SD card
Booted with and without SD card
Various button combos (Select + Power, etc.)
Does anyone know how to recover from this? Any help is really appreciated!