Hacking HELP! Black screen with no audio! Luma3DS 9.0 on 11.6 firmware

[Ricken]

Maybe, should i change the theme? I changed it to pokemon gengar #98 theme.

Try changing it and seeing if you can boot with your SD in. Dunno if that'd be the problem but if you still can't boot with SD in then it's worth a shot

 

[Quantumcat]

Try deleting home menu extdata. This has the effect of clearing theme data that could be corrupted and causing your issue. https://3ds.guide/troubleshooting