Hacking Please Help me unbricking

[dbgalex]

So i have a new 3ds xl and installed a9lh a few years ago.
Than i updated to b9s but i think som corruption happened bcause my system crashed sometimes.
So i decided to uninstall cfw but i didnt do it properbly and now my sysnand is corrupted (weird crashes and sometimes wont even boot just blackscreen) and i have no access to gm9 etc.
When i tried to reinstall cfw with frogminer it said that my system is already running cfw and i will brick it if i continue.
So what can i do?
I also have an ntrboot compatible flashcard laying around Here.

 

[KleinesSinchen]

So i have a new 3ds xl and installed a9lh a few years ago.
Than i updated to b9s but i think som corruption happened bcause my system crashed sometimes.
So i decided to uninstall cfw but i didnt do it properbly and now my sysnand is corrupted (weird crashes and sometimes wont even boot just blackscreen) and i have no access to gm9 etc.
When i tried to reinstall cfw with frogminer it said that my system is already running cfw and i will brick it if i continue.
So what can i do?
I also have an ntrboot compatible flashcard laying around Here.

Oh no, not again… The best description for this somehow widespread idea “Got a problem? Let’s just start by deleting everything!!” I’ve seen so far is:

Removing CFW means you'll have no way to fix it. Like throwing away the spare tyre because you got a flat.
[…]

First thing is to check for traces of CFW – hold (Select) while turning on to see if Luma settings appear. B9S survives “Format System Memory” and System Transfer as well as normal updates and the like. You have to run an uninstall script in GodMode9 to remove it.

The *miner methods have problems on some systems after uninstalling CFW (which is never a solution to any software problem).

If the problem you have with the *miner method is b9stool complaining about A9LH being installed although this is not (longer) true: The latest version should work on the second attempt.
Do not use any packages attached to video guides and only refer to https://3ds.hacks.guide/ – or – if you have to use the older Frogminer method because the current methods fail (System Settings not working) this one: https://3ds.eiphax.tech/frogminer.html

Using ntrboot should work in any case.
======

Once you have reinstalled CFW describe your problems as good as possible and hopefully somebody will be able to help you.