Tried to downgrade the system after i updated it by accident, now my switch only shows the nintendo logo and a black screen right after

Jollyfull · Mar 29, 2026

hi, yesterday i tried to install plants vs zombies replanted, but when i turned on the console i accidentaly pressed the update firmware button that pop´s up when theres a new update, i tried to downgrade it by following this tutorial i found on youtube/reddit

(its in spanish) followed the steps and used the script that was installed in and the correct version of it (mariko) firmware 19.0.0, i tried everything to boot into hekate to fix this but it doesnt let me do so

please help me

AndorfRequissa · Mar 29, 2026

i am always amazed at how many people keep their switches connected to the internet. i dont play online games and even when i havent setup homebrew im not keeping my consoles connected to the internet.

chrisrlink · Mar 29, 2026

you probably burnt efuses on 22 and downgrading made a mismatch count and it panicked refusing to boot

Jollyfull · Mar 29, 2026

chrisrlink said:
you probably burnt efuses on 22 and downgrading made a mismatch count and it panicked refusing to boot

so how do i fix it by myself

chrisrlink · Mar 29, 2026

you can't if you have a v2,oled or any switch manufactured after 2018 because rcm needs encoded commands using keys only nintendo has (the commands were not hash checked prior to v2 so if you had a v1 assuming you had a jig and a way to push payloads you could bypass the fuse check) but that i doubt

fmhugo · Mar 29, 2026

Is there any way to start directly on Emunand?

Jollyfull · Mar 29, 2026

chrisrlink said:
you can't if you have a v2,oled or any switch manufactured after 2018 because rcm needs encoded commands using keys only nintendo has (the commands were not hash checked prior to v2 so if you had a v1 assuming you had a jig and a way to push payloads you could bypass the fuse check) but that i doubt

i dont have a unpatched switch, this oled directly has a modchip installed in

AmeliaFox · Mar 29, 2026

Jollyfull said:
i dont have a unpatched switch, this oled directly has a modchip installed in

Turn the console completely off, hold down both volume buttons (+ and -), then press the power button until the menu appears. This mode allows you to update the system, clear cache, or restore factory settings

LuigiGad · Mar 29, 2026

First, check if the console starts in full stock. In Hekate, press reboot ---> OFW. After that, if your emummc is on a previous version, try to start the emummc via the fusee.bin. If you get a pkg1 error, extract the warmboot with Sthetix's payload. It has to start no matter what. Tested on several consoles. obviously if the emummc was operational

Tried to downgrade the system after i updated it by accident, now my switch only shows the nintendo logo and a black screen right after

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