Can We Unbrick a 3DS With No NAND Backups and a Hard Mod Yet?

Discussion in '3DS - Flashcards & Custom Firmwares' started by Xenon Hacks, May 30, 2016.

  1. Xenon Hacks
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    Xenon Hacks GBAtemp Guru

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    Wondering if it's possible to take a bricked unit, NAND mod it, dump the corrupt Nand, Fix the FIRM partitions (if it's possible), Boot Recovery and update, then dump that Nand clean NAND and downgrade via the same hard mod.
     
    Last edited by Xenon Hacks, May 30, 2016
  2. Lucifer666

    Lucifer666 all the world needs is me

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    Are you asking if we can do it without both? Or with a mod and no backup?

    You can't unbrick without a backup yet, but you can unbrick without a mod using A9LH.
     
  3. Xenon Hacks
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    Xenon Hacks GBAtemp Guru

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    Moved to actual post.
     
    Last edited by Xenon Hacks, May 30, 2016
  4. migles

    migles Mei the sexiest bae

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    edit first post with this information for extra effect and community points.
     
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  5. Xenon Hacks
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    Xenon Hacks GBAtemp Guru

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    Good Idea lol it's 5:30 AM and I have not slept my B
     
  6. Urbanshadow

    Urbanshadow GBAtemp Maniac

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    Someone correct me now, but I believe if you had some important keys (may be OTP and twl otp slot, or xorpads, or everything) you could be able to decrypt an alike working system's NAND, decrypt it and encrypt it for the new system, then restore it and get it working.
     
  7. Xenon Hacks
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    Xenon Hacks GBAtemp Guru

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    The reason this popped into my head is because this is kinda what I remember doing to unbrick my 2.1 Nand back (but not the same thing) when A9LH required a hard mod and that funky 3DSX blue screen app.
     
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  8. migles

    migles Mei the sexiest bae

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    with the "^title" you would get generic normal answers (for example: no, you can't use another console's nand backup) instead turning it into a discussion about if its possible or not to repair a corrupted nand backup
     
  9. Urbanshadow

    Urbanshadow GBAtemp Maniac

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    What I would like for you to understand is recovering a corrupted and encripted NAND is not possible. Because if the NAND is corrupted it would be decrypted into garbage.
    If you decrypt a working backup (another system or not, I think it doesn't matter) and you manage to encript it for the broken system to decript it correctly, I don't see why it wouldn't work.

    But you still need that encrypting info correctly dumped somewhere.
     
  10. Xenon Hacks
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    Xenon Hacks GBAtemp Guru

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    I don't really ave a method in mind but the idea is to not fix it completely just enough to boot the recovery menu with L+R+A+UP and let the 3DS itself do the rest.
     
  11. The Real Jdbye

    The Real Jdbye Always Remember 30/07/08

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    Reflashing FIRM without a NAND backup is possible, which probably won't be enough to fix most bricks, but in some particular cases that could be enough to save a 3DS. SAFE_MODE FIRM isn't stored in the FIRM partitions though I think, so a bricked safe mode can't be fixed without a NAND backup.
    If you have NAND xorpads though then you have much better chances of unbricking.
     
  12. Xenon Hacks
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    Xenon Hacks GBAtemp Guru

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    Could one use donor Xorpads or are those console specific too -__-?
     
  13. Urbanshadow

    Urbanshadow GBAtemp Maniac

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    They are console specific, but not version specific if I'm not mistaken.
     
  14. cearp

    cearp the ticket master

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    it depends how it is bricked, if the firm is the only problem then yeah that will fix it.
    but if it is 'bricked' because you uninstalled a bunch of system titles that you need, then no - you will have to do some more stuff :)
     
  15. MassExplosion213

    MassExplosion213 .

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    SAFE_FIRM is FIRM1 iirc.

    — Posts automatically merged - Please don't double post! —

    I know the feeling..I lost an O3DS during the unstable phase of MCH2 testing.
     
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  16. Xenon Hacks
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    Xenon Hacks GBAtemp Guru

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    Lets say your running PlaiSysUpdater and it crashes mid way for no apparent reason something like that would be fixable with some fiddling no? Since FIRM gets installed first by priority when using it.
     
  17. The Real Jdbye

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    Nope. firm0 and firm1 are identical copies, so in the event that firm0 is corrupted during an update the system won't be bricked.
     
  18. vb_encryption_vb

    vb_encryption_vb That hardmod guy....

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    From what i understand.

    With out the keys, you can't decrypt a nand on pc, so you're not able to use a donor nand to rebuild a new nand image. I actually have a system someone sent in, im not sure what they did exactly, but some how they managed to flash a corrupt emunand to sysnand. Console still worked for the time being in some sort of Frankenstein firm. Once the console was updated to 11.0 on emunand the system crashed. Crashed sysnand as well. No recovery, nothing. Just black screens. Unfortunately, they no longer had a backup of any dumps.

    Yes, im positive it was in emunand as well. Even if it was in sysnand, a update should not have bricked a system like that.
     
  19. LinkSoraZelda

    LinkSoraZelda GBAtemp Advanced Maniac

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    Nvm, I forgot about xorpads. xD

    So let's say we corrupted NATIVE_FIRM and nothing else, like from a bad downgrade. 3DS is bricked. Can we do the 11.x downgrade method and inject the corresponding NF, essentially unbricking it? I didn't make this post to be useful, I'm just curious.
     
    Last edited by LinkSoraZelda, May 30, 2016
  20. hundshamer

    hundshamer GBAtemp Advanced Maniac

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    Can we XOR a NATIVE_FIRM (if it still intact), use a decrypted NAND (XOR'ed NAND from donor machine) to rebuild a new NAND and use the XOR from the original to rebuild an operational firmware?

    EDIT: I remember rebuilding a firmware once, but it was a while ago. I forgot where we get the xorpads... Let me see if I can dig up what I did (with tons of help of course).
     
    Last edited by hundshamer, May 30, 2016