Hacking Nintendo Switch Failure Nand issue

Purity

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Don't know if anyone can suggest a way forward with this.....

Basically I've been using SX Pro with my Switch. I was on firmware 9.0.1. Took a copy of my Nand before doing anything with SX Pro

I later updated to firmware 10.2 using ChoiDujourNXv102. But didn't take a Nand backup after this.

Recently my switch failed, and both the PI3USB and M92T36 had blown. These were replaced, and the v6 Nand was restored with SX Pro

However the Switch will not boot normally. I just get a black screen, and no Ninty logo. No problem injecting a payload

I think I made a mistake and burnt fuses when I did the upgrade because I can see the fusecheck says 13.

I assume my problem is because I have a fuse mismatch, but even after I boot stock mode in Hekate which is meant to bypass the fuse check I get the same issue

Are there any options to fix this? I did spot a webpage that talks about upgradng the firmware via a PC and the PC version of ChoiDujour. Any thoughts?

Thanks!
 
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Purity

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Fuse count match so it is not that it is something else with your NAND.

I only have a Nand backup from v9.0.1. It was upgraded to v10 so the fuse count doesn't match?

I took 2xNand backups on v9.0.1. I've tried both and they do the same thing
 
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Hayato213

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I only have a Nand backup from v6. It was upgraded to v10 so the fuse count doesn't match?

I took 2xNand backups on v6. I've tried both and they do the same thing

I was referring to 10.2.0 has the fuse count of 13, so that is a match, well if you restored your NAND and it won't boot then you need to rebuild with Choidujour/emmchaccgen

https://github.com/suchmememanyskill/EmmcHaccGen
 

Purity

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Thanks. I came across the URL "Upgrading/Downgrading Manually With a PC".

Is this what Id need to do? Sorry I can't post links at present

Or is emmchaccgen a better option.
 
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Purity

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This is what I've done so far:

1) Injected the Lockpick RCM 12.0.2 to get keys. The only option I have is Dump from Sysnand, which has given me a prod.key file. I also get a message of "No emuMMC config found" at the bottom of the screen

2) Launched EmmcHaccGen2.2.3 using the --keys option and pointed it to the prod.key file, used the --fw option and pointed it to a copy of 10.2.0

This has created a folder with a number of bin files, folders (user/system and safe) and a boot.bis file.

I'm not sure what I need to do next? Any help would be appreciated please
 

Purity

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I've found a guide (in German) that seems to cover what I need to do next - point 4. Does this look ok?

[Tutorial] Switch Downgrade / FW manuell über PC neu Installieren

eMMC Restore durchführen - Alternative Methode
 
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Purity

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Sadly I've got nowhere with this.

I created an emuMMC on my SDCard and did the MMC Rebuild and System wipe as per this article, applying it to the emuMMC

https://suchmememanyskill.github.io/guides/unbrick/#system-wipe

When I go back to the Hekate payload and launch Atmo EMU I get the error:

A fatal error occured when running Atmosphere
Program ID 0100000000000005
Error Desc: std: :abort() called (0xffe)

Anyone got any ideas on what I can do?
 

Purity

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I've conceded defeat. It looks like my Nand was possibly corrupt, so I've tried to use a donor nand to rebuild the device and sadly i get the same issue. Looks like this is a no go sadly
 

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