Wii U crash os

[jofz600]

Good evening everyone,
I'm looking for some help unbricking a Wii U with a black screen due to an MLC issue. I've searched a lot of forums and asked for help on ChatGPT, but unfortunately I'm stuck.
I can launch Minute via a PTB Pico through the battery slot.
I've of course created the necessary dumps (opt, slc, seeprom). I'm not particularly interested in the MLC part; it's a console I bought on eBay.
Unfortunately, I can't install Isfshax because the boot1 is in version 8453.
Therefore, I don't know how to unbrick it; any help would be appreciated.
Thank you and I look forward to hearing from you.

 

[SDIO]

Do you have another Wii U where you can dump the boot1 from?

Post automatically merged: Oct 1, 2025

And have a look here: https://gbatemp.net/threads/how-to-set-up-isfshax.642258/post-10705260

 

[jofz600]

Yes, I already looked at this post but unfortunately I don't have another Wii U to dump Boot1.

 

[jofz600]

Bonjour, j'ai récupéré le fichier.
Mais je ne vois pas comment le réinjecter avec Minute.
Si je sauvegarde et restaure, j'obtiens une erreur « isfshax » ou « defuse not found ».

 

[SDIO]

Use the minute from here: https://gbatemp.net/threads/how-to-set-up-isfshax.642258/post-10705309
also write english

 

[jofz600]

Thanks for your feedback.
I finally found a way to flash Boot1 on your post.
Unfortunately, I made a mistake. When I started the injection, I was prompted to update the SeeProm. I thought Minute had crashed; everything was frozen. After 30 seconds, I forced the Wii U to restart.
Now, it won't start. The LED stays red.

 

[SDIO]

Try again with PTB. You have to unplug it from power to get it out of the crashed state from the missmateched boot1 version

 

[jofz600]

Sorry, but I don't really understand how to do this.
I tried restarting PTB Pico via the battery compartment, but nothing happens except for the red LED.

 

[SDIO]

When the boot1 version mismatches the version in the SEEPROM then boot0 refuses to run boot1. The LED will stay red but it will hang in a crashed state. To try again you have to remove the power to get it out of that state.

 

[jofz600]

Thank you
I can now start the boot1 injection again, but the minute is frozen.

 

[SDIO]

Hm that happened also on the other thread but worked after a few tries. Maybe PTB messes something with the SEEPROM up.

You don't need to flash it again, you can just try the sync seeprom version option.

 

[jofz600]

I managed to synchronize the seeprom and boot1.
I was able to install isfshax.
Everything is fine. Tomorrow I'll start rebuilding the MLC.
Thanks again.
:arc:

 

[jofz600]

Good evening, I'm back I haven't been able to make any progress on this Wii U. In short, it starts and boots from the SD card with the quick menu. I created the RedNand partitions on a 64GB SD card using the RedNand format function. But unfortunately, when emptying the MLC using Patch (SD) boot iOS (SLC), I get this. I don't understand why.

 

[SDIO]

For setting up redNAND use the redNAND guide: https://gbatemp.net/threads/how-to-...0-0103-failing-emmc-without-soldering.642268/
Nowhere does it say to use the format redNAND option in minute.

Also your firmware/IOSU is too old, so you also need the SLC titles and need to load the latest IOSU from SD for the install: https://gbatemp.net/threads/how-to-...ii-u-internal-memory-mlc.636309/post-10385733
If you are setting up the redNAND, then use the redNAND option with the ios_orig.img instead.

 

[jofz600]

Good evening,
Thank you again for your help.
I followed the RedNAND guide. My SD card has two partitions, as indicated in the guide.
I downloaded OSV10.
When injecting (Patch (SD) and boot SDMC: /ios_orig.img RedNAND), I got what you see in the first image.
And then, with Patch (SD) and boot IOS RedNAND, what's on the second image.

 

[SDIO]

Die you wait for the setup to finish?

 

[jofz600]

I don't understand what you mean.
I get "jumping to iOS... Go Go Go" in a few seconds.

 

[SDIO]

And what was the LED doing?

 

[jofz600]

the LED flashes blue for a moment then turns solid blue

 

[SDIO]

Then check the setup log on the sd