Hacking Please help me unbrick my Switch

[Jeppe]

I have read all other posts regarding this issue, and wouldn't post unless I was absolutely stuck.


What is my problem:

My girlfriend updated my switch from 6.1 (not sure) to 7.0. I tried to restore a NAND backup i have made, but I have the following

• The script to join my nand parts doesn't work, I merged it with a filejoiner program
• Both my boot0 and boot1 bin files are 4 MB (isn't that odd?)
• I can't launch OFW since i have burned fuses (9)
• I can't launch CFW, I get the nintendo logo, then black screen.
• I can't install 6.2 or 7.0 with ChoiDuJour

What i have:

Full nand backup
Boot backup
Biskeys dump
TSEC dump
Fuses dump
Keys.txt generated by Hactool

All the other dumps you can make with Hetake, except System/User dump

What i have tried:

• NAND restore + Boot0 % Boot1
• Lauch CFW with Atmosphere and Reinx
• ChoiDuJour
• Make a 4.x firmware to install
• Make a 5.x firmware to install

Everything went well eventually making the 5.x firmware, but it doesn't accept my biskeys for the System step​

• Make a 6.2 firmware to install

Can't make, it says NCA header invalid, can't match Encrypted_header_key​

• Make a 7.0 firmware to install

Same as above​

• Enter recovery mode

Nothing happens. I have tried to both with reboot normal in Hetake and pressing the key combination, launch normal and the key combination, launch atmosphere and use the key kombination.​

• Used hetake 4.2, 4.6 and 4.8
• GPTrestore payload

Does anyone have a suggestion as to what I can try next, or why I cant restore properly?

 

[natkoden]

just use atmosphere 0.8.4

 

[Jeppe]

just use atmosphere 0.8.4

I tried, I just get nintendo logo -> black screen

 

[Kubas_inko]

You have to make it accept the biskeys.
Also, stop focking downmgrading!!!

 

[Napsterae]

are your biskeys correct?
Did you try the manual downgrade with choi on pc ?

I had that exact problem, i tried with 5.1 and it worked.
Delete all files on safe,user and system partitions and copy the ones create by choi.
Make sure you have the proper keys for 5.1 FW, and check if your biskeys are correct.

 

[cholaloula]

Also ist your SD fat32 Formattest? Sometimes the black Screen occurs when you're in exfat

 

[Jeppe]

are your biskeys correct?
Did you try the manual downgrade with choi on pc ?

I had that exact problem, i tried with 5.1 and it worked.
Delete all files on safe,user and system partitions and copy the ones create by choi.
Make sure you have the proper keys for 5.1 FW, and check if your biskeys are correct.

My biskeys worked untill I had to use them with the system restore part of choi on pc. I used the bisdump.bin to get the keys, but I dont know how to check if they are correct or how to get them otherwise. But with Choi i'm stuck on system codes. I can use the boot0 and boot1 bis keys.

I was able to make a 5.1 FW with Choi, so I believe i have the correct keys.txt

--------------------- MERGED ---------------------------

Also ist your SD fat32 Formattest? Sometimes the black Screen occurs when you're in exfat

My card is exFat formatted. Would it help to reformat it?
I think my nand backup is corrupt, as I cant use the firmware checker on it. It cant find 'contents'

 

[natkoden]

atmosphere 0.8.4 should work, you're just missing files or having problems with the file system

format it to fat32 and download kosmos to start

and please stop downgrading

 

[Jeppe]

atmosphere 0.8.4 should work, you're just missing files or having problems with the file system

format it to fat32 and download kosmos to start

and please stop downgrading

Okay, I will try this now

 

[cholaloula]

Okay, I will try this now

I had the same problem, formatted in fat32 and everything OK, Hope it's just that : )
Enjoy your Switch

 

[Jeppe]

I had the same problem, formatted in fat32 and everything OK, Hope it's just that : )
Enjoy your Switch

I really hope so, then maybe I will be able to forgive my girlfriend

 

[Napsterae]

if none of the other suggestions works, go to the sdsetup web site where you can retrieve your biskeys. Upload fuse and tsec bins and get your biskeys.

But 1st try the other suggestions, they are safer.

 

[Jeppe]

atmosphere 0.8.4 should work, you're just missing files or having problems with the file system

format it to fat32 and download kosmos to start

and please stop downgrading

I formatted and loaded atmosphere, but still black screen

 

[natkoden]

I formatted and loaded atmosphere, but still black screen

kosmos or just atmosphere?

 

[Jeppe]

kosmos or just atmosphere?

First i installed kosmos with a blank fat32 SD. But after nintendo logo it went black (i loaded with fusee-primary.bin), then I tried using sdsetup.com to generate files and boot with that, but same result :/

I also tried booting with Hetake, using the "CFW" option on both kosmos and sdsetup.

 

[gnilwob]

There are 4 pairs of biskey.
Any of key pair works ?

 

[Philliyxx]

• Make a 6.2 firmware to install

Can't make, it says NCA header invalid, can't match Encrypted_header_key​

• Make a 7.0 firmware to install

Same as above​

• Enter recovery mode

Nothing happens. I have tried to both with reboot normal in Hetake and pressing the key combination, launch normal and the key combination, launch atmosphere and use the key kombination.​

Delete encrypted header key in your keys text file and that error should disappear using choidujour to generate 6.2 fw.

Also I don't think you can enter recovery mode with autoRCM activated.

Does your BIS keys have tweak and cyrpto keys?

 

[Jeppe]

There are 4 pairs of biskey.
Any of key pair works ?

The first 2 pairs work, but the 02 bis keys don't. And I dont know where I should get others?

 

[gnilwob]

I have tried to retrieve biskey using https://files.sshnuke.net/biskeydumpv8.zip on more than 15 switches to perform manual downgrade.
But I have never seen the problem that the bis key is not valid.

Can you re-check your bis key or try to dump it again ?

if the newly dump bis key is still invalid, I am sorry, this is beyond my knowledge.

 

[Jeppe]

• Make a 6.2 firmware to install

Can't make, it says NCA header invalid, can't match Encrypted_header_key​

• Make a 7.0 firmware to install

Same as above​

• Enter recovery mode

Nothing happens. I have tried to both with reboot normal in Hetake and pressing the key combination, launch normal and the key combination, launch atmosphere and use the key kombination.​

Delete encrypted header key in your keys text file and that error should disappear using choidujour to generate 6.2 fw.

Also I don't think you can enter recovery mode with autoRCM activated.

Does your BIS keys have tweak and cyrpto keys?

I managed to create a 6.1 FW, but I can't make 6.2, but it shouldn't really matter i think.

I tried without recovery mode too, but then my switch is just all black all the time.

Yes, I tried both with biskeydump.bin saved to SD card, and QR scan. The first don't divide them, but I know the first half is the teak and latter is crypto.
When I try to install the 6.1 FW with Choi on PC i get to the 'SYSTEM' step, where i get red text

--------------------- MERGED ---------------------------

I have tried to retrieve biskey using https://files.sshnuke.net/biskeydumpv8.zip on more than 15 switches to perform manual downgrade.
But I have never seen the problem that the bis key is not valid.

Can you re-check your bis key or try to dump it again ?

if the newly dump bis key is still invalid, I am sorry, this is beyond my knowledge.

I redumped, but still the same, I can get to 'system' but no further, because my 02 and 03 key don't work :/