Question Help, trying to unbrick 6.1.0

By Lazardo, Feb 27, 2019 2,525 35 0

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  1. Lazardo

    OP Lazardo Member
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    Hello,

    I got a 2nd hand Switch on a semi brick state, it's on auto rcm, I can inject payloads on it but it doesn't boot either OFW or CFW.

    I have been following the guide How to install/run ANY Switch firmware UNOFFICIALLY (WITHOUT burning any fuses) up until STEP 7: GENERATE the files/images to be transferred to the console via ChoiDujour

    On that step I get:
    ChoiDujour 1.1.0 by rajkosto
    uses hactool by SciresM (xxxxxxx)
    visit xxxxx for updates and more Switch stuff!

    Using source firmware files from folder Firmware
    Traceback (most recent call last):
    File "ChoiDujour.py", line 517, in <module>
    File "ChoiDujour.py", line 225, in call_hactool
    Exception: [WARN]: Failed to match key "master_kek_04", (value "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx")
    [WARN]: Failed to match key "master_kek_05", (value "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx")
    [WARN]: Failed to match key "master_kek_02", (value "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx")
    [WARN]: Failed to match key "master_kek_03", (value "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx")
    [WARN]: Failed to match key "master_kek_00", (value "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx")
    [WARN]: Failed to match key "master_kek_01", (value "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx")

    I have edited the keys file, removed the master_kek_* entrys and got:
    ...

    Everything is Ok

    Size: 1146880
    Compressed: 22709
    Verifying file SYSTEM/save/8000000000000120
    All files verified! Prepared firmware update is in folder E:\ChoiDujour110\NX-6.1.0_exfat

    But the folder e:\ChoiDujour110\NX-6.1.0_exfat\SAFE is empty, which makes me believe that something is wrong. I have checked the SAFE partition on the emmc and it is also empty.
     
  2. Sucuk60

    Sucuk60 Member
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    I downgraded my Switch too and the folder SAFE was empty :)
     
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  3. Lazardo

    OP Lazardo Member
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    When you mount the SAFE folder wjth
    When you mount the SAFE folder with HacDiskMount is it also empty (mine is...)
     
  4. Philliyxx

    Philliyxx GBAtemp Fan
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    I've downgraded with SAFE folder empty as well.
     
  5. Adran_Marit

    Adran_Marit Walküre's Hacker
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    This is fine, you can continue the process
     
  6. Lazardo

    OP Lazardo Member
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    I did it and it's still bricked, the only clue that I have is that the on the console the SAFE folder is empty, the previews owner mus have erased it, is there any way to get/build the contents of that folder?
     
  7. PrEtZaL

    PrEtZaL Advanced Member
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    This is not your problem the SAFE partition can be empty. How far through the boot process do you get?
     
  8. Adran_Marit

    Adran_Marit Walküre's Hacker
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    I can assure it is okay if the safe folder is empty.

    try the rest of the process again, if it doesn't boot I suspect they attempted a manual downgrade and formatted the nand
     
  9. PrEtZaL

    PrEtZaL Advanced Member
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    As long as they didn't mess up the boot files and prodinfo it should be recoverable. Also try using hekate 4.6 with the custom kip and hekate file from choidujour. I had issues with 4.8 on a downgrade, but work fine after 1st boot
     
    Last edited by PrEtZaL, Feb 27, 2019
  10. Adran_Marit

    Adran_Marit Walküre's Hacker
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    Boot files dont matter when doing the downgrade.. prod info does.... I suspect the original owner might have attempted a downgrade and clicked format
     
  11. PrEtZaL

    PrEtZaL Advanced Member
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    No they won't matter on downgrade, although if they're buggered it won't boot.

    If they formatted should be able to see by using a hex editor
     
  12. Lazardo

    OP Lazardo Member
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    I will assume that they did that, is there any way to recover it?
     
  13. Adran_Marit

    Adran_Marit Walküre's Hacker
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    again re-try the downgrade/rebuild process, let me know how it goes, if it fails to boot again message me as I have something I wish to try
     
  14. PrEtZaL

    PrEtZaL Advanced Member
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    If they formatted the boot file partitions without a backup then no.......
     
  15. Lazardo

    OP Lazardo Member
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    I did that several times with the Firmware 6.1.0 (checked the burnt fuses and rawnand and they match)
     
  16. Adran_Marit

    Adran_Marit Walküre's Hacker
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    Message me on discord, it will be quicker and easier but I can think of one thing that *might* and that is a veeery big might help
     
  17. Sucuk60

    Sucuk60 Member
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    Your problem is you created the fw folder in Choi with exfat support!
    In Choi you should type: the command —noexfat

    That was my problem.
     
  18. Adran_Marit

    Adran_Marit Walküre's Hacker
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    how is exfat the problem
     
  19. Sucuk60

    Sucuk60 Member
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    My problem was exfat support. First time I downgraded it with Choi (5.1 exfat) and then the switch still had a blackscreen. As I tried it without exfat support on fw 5.1 (because I read it here) .. everything worked fine.

    Sorry for my english!
     
  20. Adran_Marit

    Adran_Marit Walküre's Hacker
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    Odd, you're the first person I've seen with that issue. No one else I know who's done this has had a problem with the exfat support
     
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