Hacking Downgraded to 1.0, now can't boot

[w00dey]

Hi guys!

I saw that in theory if you use a CFW which disables fuses, you can use any firmware you want. To test it out I installed 1.0 via ChoiDujourNX, and since that I can't boot my switch. RCM works, but I tried to boot from SX OS and ReiNX, both of them didn't work. I tried booting from OW, but it gives me an error message 2002-4315 error message probably because of the fuses. I installed the non-exfat version of the FW previously I used the exfat versions and I have my SD card formatted to exfat if that matters.
Is there any way to get the 1.0 to boot or to roll back to 6.0.1 or 5.1.0? I also don't have any backups unfortunately.
Thanks for your help in advance!

 

[The Real Jdbye]

Hi guys!

I saw that in theory if you use a CFW which disables fuses, you can use any firmware you want. To test it out I installed 1.0 via ChoiDujourNX, and since that I can't boot my switch. RCM works, but I tried to boot from SX OS and ReiNX, both of them didn't work. I tried booting from OW, but it gives me an error message 2002-4315 error message probably because of the fuses. I installed the non-exfat version of the FW previously I used the exfat versions and I have my SD card formatted to exfat if that matters.
Is there any way to get the 1.0 to boot or to roll back to 6.0.1 or 5.1.0? I also don't have any backups unfortunately.
Thanks for your help in advance!

Always, ALWAYS make a NAND backup when messing with NAND. That shouldn't even need to be said.
But I think you can use ChoiDujourNX to update it.

 

[w00dey]

Always, ALWAYS make a NAND backup when messing with NAND. That shouldn't even need to be said.
But I think you can use ChoiDujourNX to update it.

How? To use ChoiDujourNX, I have to boot the homebrew menu. Now I can only go into RCM

 

[a9lh-1user]

AFAIK the 1.0.0 files are not working. So you can't get back to that version.

Original from rajkosto:

• Extract the UPDATE partition from an XCI image of the cartridge that contains the update you want into a folder

These are common cartridges and firmware versions they contain:
Puyo Puyo Tetris/ 1-2 Switch (1.0.0) - would never recommend installing this one as no Switch made with 1.0.0 actually runs it (its a slightly different 1.0.0 with exFAT that bricks you)

Anyway you can ask him to try to put you into the right direction. (He is very helpfull!)

 

[The Real Jdbye]

How? To use ChoiDujourNX, I have to boot the homebrew menu. Now I can only go into RCM

Sorry, it's ChoiDujoir not ChoiDujoirNX.
https://gbatemp.net/threads/how-to-...nofficially-without-burning-any-fuses.507461/
This should all be doable with a bricked Switch.

 

[w00dey]

Thanks for your help guys, so far I managed to dump my SBK and TSEC keys and I dumped the BOOT0 and BCPKG2-1-Normal-Main files from my switch in order to dump the keys. However when I launch the python script it fails with an error message: Could not find sd_card_kek_source! Please check the integrity of the data used in the current stage!
What should I do now?

 

[a9lh-1user]

I'am sure you do your best.....but i think you should contact @rajkosto because he is the writer of the tools. And he can tell you what to do before you got into worst trouble!

 

[w00dey]

I'am sure you do your best.....but i think you should contact @rajkosto because he is the writer of the tools. And he can tell you what to do before you got into worst trouble!

Okay, I tried to post in that tutorial thread, I hope he'll answer me, thanks!