Black screen on power on

[rafamf]

I bought a second hand switch that already came with a sx os installed, correctly activated, and working very well. Except Zelda didn't load, no matter what I do.
I tried some things to fix that, included redownloading it, reinstalling, and etc.

Then I noticed the switch was using FW 9.2.0, and SX OS 2.9.4 Beta.

So, I decided to downgrade it to 9.1.0 using ChoiDujourNX.

Apparently it worked well, as I could reboot, but then I realized I had forgot to include the Zelda file on sd card.

Pluged sd on computer, copied the files, pluged back on Switch, and I cannot boot it any longer. It just gives me a black screen.

So far, I only tried to put back SX OS 2.9.2 boot file on card. No change.

Any thoughts?
-- Update --

I was able to recover using briccmii payload with TegraRCMSmash to fixing the first byte of every BCT's pubkey in BOOT0 so my Nintendo Switch could boot normally on OFW.

Then, updated firmware back to 9.2.0, and I'm back on using SX OS 2.9.4 beta.

Still unable to play Zelda

 

[imprezgc8]

What do you mean unable to play Zelda? That was a day 1 game and works on just about every FW if you don't have updates installed. Try your cart and if that works then try to dump the cart again. If you downloaded from the eShop that can make it a little harder, but depending on if you have a clean nand or not you can boot to that and redownload and dump the game that way.

 

[rafamf]

Seems like if a game is played with a new update, even if you uninstall the game and try to install it again without this newer update, the game doesn't work.

I restored factory configuration on Switch, and finally got it to work.