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Question Help recover switch without BOOT0/BOOT1 backups

Discussion in 'Switch - Exploits, Custom Firmwares & Soft Mods' started by simon66, Apr 25, 2019.

  1. simon66
    OP

    simon66 Advanced Member

    Newcomer
    1
    Jan 31, 2016
    Canada
    Hi,
    I bought a "broken" switch on eBay (for parts) and to my surprise, it wasn't really broken. The person had AutoRCM enabled without knowing. Once I disabled that, the console (Which was on firmware 5.1.1) would only boot if I had CFW enabled (Atmosphere). Being new to the switch hacking scene, I only backed up the rawnand.bin, tsec_keys.bin and fuses.bin (I didn't dump BOOT0/BOOT1 because I thought it was included in rawnand.bin).

    While on Atmosphere, I updated the console to the latest firmware (Im assuming I updated it to either 8.0.0 or 8.0.1). At this point, the console wouldn't even boot up (No nintendo logo or switch logo would appear). It was at this point that I decided to backup BOOT0 and BOOT1 while on this new firmware (I did not backup the rawnand.bin again). Without thinking about it, I flashed the original rawnand.bin back(The 5.1.1 dump) but the console would still not boot up. Reading online, I found a tutorial describing how you can patching your dumps for upgrade/downgrade. I used ChoiDujour to patch the BOOT0/BOOT1 dumps I took while on the new firmware, and I used the 5.1.1 firmware files to patch the dump rawnand.bin dump. I then flashed those files to my Switch and to my surprise, I worked! Kinda. I'm now able to see the Atmosphere logo, but my console wont boot neither on CFW or official firmware.

    Sorry for the long story, but my question is as follows:

    1) Can I downgrade my BOOT0/BOOT1 dumps from 8.0.0 to 5.1.1?
    2) Im an idiot, I know, I should've backed up everything
    3) Is this unit still recoverable? I don't know the history on it, but it looks like the NAND might've been touched before I even got this console

    Any help would be appreciated :)
     
  2. linuxares

    linuxares I'm not a generous god!

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    Aug 5, 2007
    Sweden
  3. Napsterae

    Napsterae Member

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    Feb 24, 2019
    Portugal
    Search for manual downgrade with choi on PC. I had the exact problema like you and that helped me.
    Use fw 5.1. I tried with 6.1 and that didnt work
     
  4. simon66
    OP

    simon66 Advanced Member

    Newcomer
    1
    Jan 31, 2016
    Canada
    thanks for the link. I tried flashing both BOOT0 and BOOT1 and now it doesn't even show the Atmosphere logo. I don't know if I flashed the wrong file, or it just didn't work.

    Thats the link I was following in the first place. There might be something wrong with this unit since Im unable to use memloader (it crashes on any payload I select).


    At this point, is it even worth downgrading to 5.1.1? I don't know what to do next :S
     
  5. Philliyxx

    Philliyxx GBAtemp Regular

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    Sep 21, 2018
    United States
  6. Kubas_inko

    Kubas_inko "Something funny goes here."

    Member
    13
    Feb 3, 2017
    Czech Republic
    I gues on earth.
    As people said, you need to use choidujour and rebuild your nand. IIRC, choidujourn can build only up to 6.0.x (not sure now).
     
  7. mattytrog

    mattytrog You don`t want to listen to anything I say.

    Member
    12
    Apr 27, 2018
    United Kingdom
    Will make a new boot repair package. If @iriez would sort out the hosting maybe?

    #ihateanime
     
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  8. mattytrog

    mattytrog You don`t want to listen to anything I say.

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    Apr 27, 2018
    United Kingdom
    Check my git for a new file.
     
    simon66 likes this.
  9. linuxares

    linuxares I'm not a generous god!

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    Aug 5, 2007
    Sweden
    BOOT_REPAIR_PACKAGE_iha2.7z this one?
     
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  10. mattytrog

    mattytrog You don`t want to listen to anything I say.

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    Apr 27, 2018
    United Kingdom
    yep.
     
  11. linuxares

    linuxares I'm not a generous god!

    Moderator
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    Aug 5, 2007
    Sweden
    Hint, check Matty's github with the repo name _PART2
     
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  12. iriez

    iriez GBAtemp Fan

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    Oct 27, 2016
    United States
    Of course just pm me the content :grog:
     
  13. mattytrog

    mattytrog You don`t want to listen to anything I say.

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    Apr 27, 2018
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    Will do.

    I think a bit of work is needed though.
     
  14. mattytrog

    mattytrog You don`t want to listen to anything I say.

    Member
    12
    Apr 27, 2018
    United Kingdom
    Made a new pack.

    Wasn`t happy with the other two.

    This pack will repair you to 6.2.0... Regardless of fuses burned.
    7.0.1 & 8.0.1 included too.

    @iriez I pm`d you if you would do the honours for me sir!
     
    Philliyxx likes this.
  15. vastrolorde

    vastrolorde Advanced Member

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    Mar 22, 2015
    United States
    This is really great can this fix nxboot error? btw there is a password on the archive on your git.
     
  16. mattytrog

    mattytrog You don`t want to listen to anything I say.

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    Apr 27, 2018
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    I`ll PM you.
     
    vastrolorde likes this.
  17. iriez

    iriez GBAtemp Fan

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    Oct 27, 2016
    United States
    Its uploaded to xbins in -

    /SWITCH/CFW/_CFW Tools/Unbrick Your Switch Pack/Unbrick_Your_Switch.7z
     
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  18. Slim45

    Slim45 Advanced Member

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    Aug 6, 2018
    United Kingdom
    so nice to see the community helping out like this
     
    simon66 likes this.
  19. simon66
    OP

    simon66 Advanced Member

    Newcomer
    1
    Jan 31, 2016
    Canada
    Thanks for the help :)
    I have the file but looks like the lowest firmware it was is 6.2.0 (which is not supported by ChoiDujoir). Going to look around and see how I can manually get this to work on 6.2.0

    Im slowly making progress. Looks like this unit might not be a gonner after all.
     
  20. mattytrog

    mattytrog You don`t want to listen to anything I say.

    Member
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    Apr 27, 2018
    United Kingdom
    I need feedback as to if it is working for people, or how I can streamline the process.
     
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