Safe proper way to downgrade to 6.2 (NO NAND BACKUP NEEDED)

Discussion in 'Switch - Tutorials' started by pohaxsf, Mar 12, 2019.

  1. pohaxsf
    OP

    pohaxsf Member

    Newcomer
    1
    Jan 7, 2019
    Greece
    Hello. After I saw this many of bad turtorials, I decided to help you on doing a downgrade without a nand backup.
    Let's begin. Make sure you have enabled autorcm on hekate https://github.com/CTCaer/hekate/releases
    First step make a folder on your sd named "FW"
    Second step I don't know if it's against the rules to give you fw files from here, better safe than sorry! Anyway, google "Switch firmware files" and you should find a link
    Third step download 6.2 and unzip it on the fw folder we made
    Fourth step if you don't use atmosphere we will need to use it to get to choidujournx, put the files on your sd card https://github.com/Atmosphere-NX/Atmosphere/releases
    You can use external payload with SX pro and gear by putting the atmosphere payload on the root of sd and injecting it through the menu of sx. press vol+ while booting sx and click options then external payload, then atmosphere's payload. Don't do this now since we haven't put choidujournx on the sd yet.
    Fifth step make sure you have choidujournx on your switch folder https://switchtools.sshnuke.net/
    Sixth step boot on atmosphere (for sx pro and gear users launch now your external payload) and open choidujournx on the hbmenu
    Seventh step choose the fw folder and click select all. It will start reading the files
    Eighth step it will ask you if you want exfat 6.20 or 6.20. choose exfat
    Ninth Click system initialize (WARNING All games saves and stuff will be gone once we do this) If we don't do this, brick chances hit the roof!
    Tenth start installation
    Eleventh click reboot once it's done.
    twelfth click reboot now
    Thirteenth, inject your old payload and start the setup.
    Good luck!
    It means a lot to me if you like my post!
    Ask me any questions and if I can, I'll answer!
     
    Last edited by pohaxsf, Mar 12, 2019
    nWo, KuranKu, FEF1 and 3 others like this.
  2. dempseyromeo

    dempseyromeo Newbie

    Newcomer
    1
    Mar 2, 2019
    United States
    My steps were almost the same as yours, except I didn't select "wipe/reset my switch" in ChoidujourNX, then it bricked.
    Although I restored my Nand backup, but it took me 70-80 mins to restore. It's so long.
    Perhaps, when I got the time. I'll try to downgrade again.
     
  3. ScarletDreamz

    ScarletDreamz [Debug Mode]

    Member
    11
    Feb 16, 2015
    United States
    Localhost
    Funny how that "ALMOST" caused a Brick, dosn' it?
     
    nWo likes this.
  4. mattytrog

    mattytrog Not on my watch.

    Member
    11
    Apr 27, 2018
    United Kingdom
    If anyone bricks during a 6.2 downgrade and you don`t have an emmc backup, the best thing to do is

    Use "blank" 6.2 BOOT0/1 files - I have made some but I`m not sure how legal they are.
    Build a customised version of Hekate which ignores incorrect restore size, restore these "blanks" in Hekate
    Boot Atmosphere CFW. First boot will complete... Then you can boot stock (thru Hekate / fusee-primary only as fuse count will be incorrect)

    This is the way I do it anyway.
     
  5. shado9573

    shado9573 GBAtemp Regular

    Member
    2
    May 25, 2017
    Pakistan
    So is this way even reliable to go online assuming we downgrade? or reinstall our system to the same exact system version? then just reboot normally and do the setup? (Leave the Brick Out)(I still have a Clean 6.2.0/7.0.1 NAND backup).
     
  6. pohaxsf
    OP

    pohaxsf Member

    Newcomer
    1
    Jan 7, 2019
    Greece
    No, because it doesn't wipe files we need to clear. I will make a new turtorial in 12 hours cuz I am out of home

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

    I am noy trying this because I have not bricked my switch. Imo I would make from choidujour pc a nand of 5.10. Choi is really useful these days.
     
  7. Adran_Marit

    Adran_Marit Walküre's Hacker

    Member
    8
    Oct 3, 2015
    Australia
    42*South
    I'm curious how you made the blank boot files?
     
  8. mattytrog

    mattytrog Not on my watch.

    Member
    11
    Apr 27, 2018
    United Kingdom
    Easy.
    Simple.

    You need 2 x boot0 from different consoles. On the same FW.
    Do a diff on them both. The correct sections are easy to spot. Delete diff, zero-fill
    Chop to 1536kb (17FFF0)

    Restore with Hekate (with size check disabled - build your own. I`m putting an option in my simple-uf2 to do just that.)
    Boot with AMS
     
    Last edited by mattytrog, Mar 13, 2019
  9. Adran_Marit

    Adran_Marit Walküre's Hacker

    Member
    8
    Oct 3, 2015
    Australia
    42*South
    I know I can get clean ones from 6.1 and below, could I ask a favour as I've only got the one console, could you send me blank 6.2, 7.0 and 7.0.1 boot files?
     
  10. mattytrog

    mattytrog Not on my watch.

    Member
    11
    Apr 27, 2018
    United Kingdom
    I can, but how? The copyright police members on here would jump on me.
     
  11. Adran_Marit

    Adran_Marit Walküre's Hacker

    Member
    8
    Oct 3, 2015
    Australia
    42*South
    you're on discord? I'm in the DI server, pm
     
  12. linuxares

    linuxares I'm not a generous god!

    Moderator
    15
    Aug 5, 2007
    Sweden
    Hit him up on Discord. I think I know what he is trying to do.
     
  13. mattytrog

    mattytrog Not on my watch.

    Member
    11
    Apr 27, 2018
    United Kingdom
    Went on it before, but I have no idea what I`m doing on dickscord.

    I`ll go on later. Have to do a 60 mile drive in about 10 minutes.
     
  14. linuxares

    linuxares I'm not a generous god!

    Moderator
    15
    Aug 5, 2007
    Sweden
    Drive safe!
     
    mattytrog likes this.
  15. Adran_Marit

    Adran_Marit Walküre's Hacker

    Member
    8
    Oct 3, 2015
    Australia
    42*South
    alrighty, as I said I'm in the dragon injector server (if your not my sig has the invite link by clicking on it) then message from there :)


    That wasn't what I had in mind, if its what you messaged about, but it will be handy to have :O
     
  16. linuxares

    linuxares I'm not a generous god!

    Moderator
    15
    Aug 5, 2007
    Sweden
    Maybe it's the issue why it won't boot. So who knows ;)
    Then any risk of bricks would be null, atleast restorable to a functioning state.

    Maybe @mattytrog would be intrested and try to crack the last hurdle?
     
  17. Adran_Marit

    Adran_Marit Walküre's Hacker

    Member
    8
    Oct 3, 2015
    Australia
    42*South
    Can you confirm what fw the backup is please as that might help :O

    but indeed
     
  18. linuxares

    linuxares I'm not a generous god!

    Moderator
    15
    Aug 5, 2007
    Sweden
    6.2.0, I think I said it in our discord group.

    Let's continue this in PM if need be, lets not go more Off-topic. (even if it's slight on topic)
     
    Adran_Marit likes this.
  19. Adran_Marit

    Adran_Marit Walküre's Hacker

    Member
    8
    Oct 3, 2015
    Australia
    42*South
    @mattytrog can you DM me on discord preferably on the account
    Adran 2#1932 or on my main which is adran#5747
    Thanks
     
Loading...