Hacking Unbrick WiiU freezes during boot

[MarcelBeee]

Hi,

i think, i bricked my WiiU yesterday. The WiiU boot is stopped during showing the WiiU Boot screen. The music is played for around 10 seconds, but is stopping during playing a tone. Pressing B during boot to go to vWii isn't working.

I searched the internet and some people described, that the problem can be fixed by moving the gamepad far away from the console. I tried this, but without success. I will try this today again, by removing the device into my basement, but i think, this won't fix my problem.

My WiiU has been bricked during installing a dumped WiiU game via the wad installer to internal NAND. The wad installer stopped at 100%, but has been never finished. I waited a long time (~1hour) and finally reboot the console by unplugging the power supply. Afterwards the boot freeze occurs.

I used coldboot haxchi as custom firmware.

I think, i my NAND become corrupted, during the failed WAD installation. If i understand it correct, this should be fixed by MLC-Backup via MMC-Card Adapter and flashing the eMMC.

I created my complete NAND backup before modifying my device. The backup also didn't contains the used DS game for the coldboot haxchi.

I fear, after using my backup to restore the corrupted MLC, i will run into the problem, that the modified SLC expects the missing ds game. Is this correct? I also have to restore my dumped SLC?

Would be very gracefully if somebody can give me some feedback. I searched a lot and found different descriptions, how to fix the problem, but i'm not sure, if they are are all up to date. I hope that's there is maybe an more easier solution, which i haven't found yet or that i can avoid to restore the SLC.

Thanks in advance,

Marcel

edit: hmm, my title isn't very useful...Is there an option to also edit the title?

 

[mive]

I think your only option would be https://gbatemp.net/threads/guide-kaflukes-hardmod-cbhc-unbrick-guide.476725/
which seems very difficult (if you never done stuff like this before), But if the nand has really an issue this probably would only help for a short period.
About the mmc thingy, never heard of that and also, how would you connect a mmc card to the wiiu? Are the even big enough mmc cards which would be able to store the wiiu nand?

 

[MarcelBeee]

I thought, using the successfully-dumped-wiiu-emmc-nand-with-hardmod method (i'm not allowed to post links...), i can also write my dump back to the eMMC device. Reading it a second time, it seems, this not common. Don't know, if this will work =/

I already ordered a teensy, but if i could avoid open my device, this would be good =)

 

[BaamAlex]

Is this correct?

Nope. The nand backup is clean in this case and doesn't expect the ds game. Even if you create a backup with installed haxchi is no problem (for the case you have to restore it).

 

[mive]

ah ok, I was confused by the "MMC-Card" line (thought you meant this https://upload.wikimedia.org/wikipedia/commons/e/eb/Multimediacard_32mb_siemens.jpg).

I hope it works for you as it seems difficult to accomplish and also if you look at the end of the linked thread other people seem to have issues to successfully restore their nand.

please update if it worked for you or not.