Hacking Got unable to run any DS game on my modded 3ds

[andxry]

Hi guys, first of all sorry if I say something wrong, English is not my main language.
Btw o got myself a modded 3ds and everything was fine but I messed up, I don't know what I did but now I'm unable to run any ds game on it. I think I did something on the FBI but I can't tell what I did exactly.
Is there any way to troubleshoot so I can run ds games?
because actually I'm not able to run any either as an actual game nor trough the download mode.

Thanks in advance

 

[Tokiwa]

Try this:

https://3ds.hacks.guide/troubleshooting#software-issues-on-devices-with-custom-firmware

Follow all the steps under "DSi / DS functionality is broken or has been replaced with Flipnote Studio".

 

[andxry]

i made it trough the system update step but still i cant run any ds/dsi game, it goes all black screen
i appreciate your help tho

 

[GUEDES_et_al]

Have you run the homebrew TWL Fix?

Cause the 3ds systems check all the installed titles (broken ones pass on the test) and only update the missing titles.

So, you need to remove the broken TWL titles first using the homebrew, and doing a system update after that.