Hey, my case is probably already unrecoverable but here's the issue : my n3ds sysnand was running on luma3ds (can't remember the version, sorry). Someone told me that i would have to update a9lh before doing the firm update to 11.3. So i used this tutorial https://3ds.guide/updating-a9lh.html and after the "sucessfull update" by pressing select, the console started to boot on a blackscreen. I tried to remove the sd card, press any kind of buttons butt the problem is still there. Do i have any solution ? Thanks.