Hacking Question Blue screen and semi-brick after restore from nand backup 6.2

[Sevroo]

Hi guys. This forum and you are my last hope.
I was recovering nand backup 6.2 firmware by hekate and now my switch when I launch normally starts with blue screen.
I tried various payload: fusee-primary, reinx loader, sx payload, hekate. Only hekate works and when I try launch CFW atmosphere it shows "Fatal error: Failed to decrypt the Package2 header (master key revision 6)!"
I tried several times with different sd cards and always the same. I tried gpt restore and nothing. I have BOOT0/1, full rawnand.bin and biskeys from OFW 6.2 and I have burnt 8 fuses.
What else can I do? A lot of post leads to @rajskoto tutorial (gbatemp.net/threads/how-to-install-run-any-switch-firmware-unofficially-without-burning-any-fuses.507461/) ,but can this tutorial helps in my case ? How adapt it to my problem ? It is very complicated. Maybe there is other solution ?
Please help.

 

[The Real Jdbye]

Hi guys. This forum and you are my last hope.
I was recovering nand backup 6.2 firmware by hekate and now my switch when I launch normally starts with blue screen.
I tried various payload: fusee-primary, reinx loader, sx payload, hekate. Only hekate works and when I try launch CFW atmosphere it shows "Fatal error: Failed to decrypt the Package2 header (master key revision 6)!"
I tried several times with different sd cards and always the same. I tried gpt restore and nothing. I have BOOT0/1, full rawnand.bin and biskeys from OFW 6.2 and I have burnt 8 fuses.
What else can I do? A lot of post leads to @rajskoto tutorial (gbatemp.net/threads/how-to-install-run-any-switch-firmware-unofficially-without-burning-any-fuses.507461/) ,but can this tutorial helps in my case ? How adapt it to my problem ? It is very complicated. Maybe there is other solution ?
Please help.

Have you restored the boot0/boot1?

 

[Sevroo]

Yes, I restored BOOT0/1 several times along with rawnand.bin.

 

[LadyApollo]

What happened for you to need to restore your backup?

 

[Sevroo]

What happened for you to need to restore your backup?

I installed many games at once. After it I wanted to check them and every new installed game did not turning on (there was some kind of message but I don't remeber it exactly). I wanted repair this problem by copy and format sdcard and it only getted worse. The old games which was working previously showed that they need internet connection. So I wanted to restore nand backup via hekate, clear everything and start again, but I finished with semi-bricked switch. In that time I didn't know the shortcut to service menu and factory reset which probably would be better option than nand recovery.

 

[Modificatorul]

I don't think it's a easy way in your case.
Use this guide https://gbatemp.net/threads/how-to-...nofficially-without-burning-any-fuses.507461/
to recreate a 6.1 working nand ,choidujur pc version don't support 6.2 fw yet , after this use heakate to boot to cfw and then update to 6.2.0 via ChoiDujourNX untick option with somthing like not burning fuses. https://gbatemp.net/threads/choiduj...ller-homebrew-for-the-nintendo-switch.513416/

 

[jorgesd]

so you just restored a nand backup 6.2 with the boot00/01 and the exact fuses burned and got a semibrick console? if that is right then i'm afraid too if i restore my nand i'll get a semi brick console. What guide do you followed?

 

[JJTapia19]

Blue screen is the result of installing a boot0 and boot1 of a firmware that does not match the rawnand. It can be caused by other stuff but that's the most common issue I've seen.

 

[Sevroo]

Thanks for suggestions. You guys are masters. This forum is the best. I followed for this tutorial (guide dot sdsetup dot com / hash /manualchoidowngrade)(As a newbie I can't send links ) and downgrade my switch. And now It's works . I struggled most for keys, this was the biggest problem. I have to research a lot to uderstand whats going on. Eventually I found them in the net but ChoiDujour complaint about them. It is very important to save them in keys.txt file with ANSI code and following format.

• master_key_00 = XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
• master_key_01 = XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
• [... all master_keys through the latest one required by the firmware you're trying to install]
• header_key = XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
• aes_kek_generation_source = XXXXXXXXXXXXXXXXXXXXXXXXXXXXX
• aes_key_generation_source = XXXXXXXXXXXXXXXXXXXXXXXXXXXXX
• key_area_key_application_source = XXXXXXXXXXXXXXXXXXXXXXXXXXXX
• key_area_key_ocean_source = XXXXXXXXXXXXXXXXXXXXXXXXXXXXX
• key_area_key_system_source = XXXXXXXXXXXXXXXXXXXXXXXXXXXX
• package2_key_source = XXXXXXXXXXXXXXXXXXXXXXXXXXXX

Thanks one more time for help.

 

[jorgesd]

Thanks for suggestions. You guys are masters. This forum is the best. I followed for this tutorial (guide dot sdsetup dot com / hash /manualchoidowngrade)(As a newbie I can't send links ) and downgrade my switch. And now It's works . I struggled most for keys, this was the biggest problem. I have to research a lot to uderstand whats going on. Eventually I found them in the net but ChoiDujour complaint about them. It is very important to save them in keys.txt file with ANSI code and following format.

• master_key_00 = XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
• master_key_01 = XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
• [... all master_keys through the latest one required by the firmware you're trying to install]
• header_key = XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
• aes_kek_generation_source = XXXXXXXXXXXXXXXXXXXXXXXXXXXXX
• aes_key_generation_source = XXXXXXXXXXXXXXXXXXXXXXXXXXXXX
• key_area_key_application_source = XXXXXXXXXXXXXXXXXXXXXXXXXXXX
• key_area_key_ocean_source = XXXXXXXXXXXXXXXXXXXXXXXXXXXXX
• key_area_key_system_source = XXXXXXXXXXXXXXXXXXXXXXXXXXXX
• package2_key_source = XXXXXXXXXXXXXXXXXXXXXXXXXXXX

Thanks one more time for help.

what you mean keys? im'm nwebie as well i cant be sure of what to backup to avoid any problems in the future if i try to downgrade my console. My 6.2 backup is the following

Is that all i need if i want to downgrade? I'll appreciate if you send the link through pm :d

 

[Sevroo]

There are two kinds of keys. First type is you personal nintendo switch keys which can be obtain by biskeydump and other tools. Second type are masterkeys which are necesery for downgrade and nand recovery. This second type is available by google and if you want use them with choidojour you have to save them in format which I gave.
Your files are for restore system to 6.2 firmware and when this backup is not broken then you don't have to downgrade below firmware 6.2

 

[kenshinchai]

hi, how to fix it? my switch keep boot to rcm mode, cant boot ofw and cfw.

 

[kenshinchai]

Thanks for suggestions. You guys are masters. This forum is the best. I followed for this tutorial (guide dot sdsetup dot com / hash /manualchoidowngrade)(As a newbie I can't send links ) and downgrade my switch. And now It's works . I struggled most for keys, this was the biggest problem. I have to research a lot to uderstand whats going on. Eventually I found them in the net but ChoiDujour complaint about them. It is very important to save them in keys.txt file with ANSI code and following format.

• master_key_00 = XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
• master_key_01 = XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
• [... all master_keys through the latest one required by the firmware you're trying to install]
• header_key = XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
• aes_kek_generation_source = XXXXXXXXXXXXXXXXXXXXXXXXXXXXX
• aes_key_generation_source = XXXXXXXXXXXXXXXXXXXXXXXXXXXXX
• key_area_key_application_source = XXXXXXXXXXXXXXXXXXXXXXXXXXXX
• key_area_key_ocean_source = XXXXXXXXXXXXXXXXXXXXXXXXXXXXX
• key_area_key_system_source = XXXXXXXXXXXXXXXXXXXXXXXXXXXX
• package2_key_source = XXXXXXXXXXXXXXXXXXXXXXXXXXXX

Thanks one more time for help.

my switch semi bricked too

 

[LapCheong]

There are two kinds of keys. First type is you personal nintendo switch keys which can be obtain by biskeydump and other tools. Second type are masterkeys which are necesery for downgrade and nand recovery. This second type is available by google and if you want use them with choidojour you have to save them in format which I gave.
Your files are for restore system to 6.2 firmware and when this backup is not broken then you don't have to downgrade below firmware 6.2

Just use lockpick on your current firmware. You will get your keys. I still have no idea what is biskeudump is used for

 

[MUDD_BR]

Op, how many games did you has at first, to trigger this error? And your card was exfat or fat32?

 

[jorgesd]

Just use lockpick on your current firmware. You will get your keys. I still have no idea what is biskeudump is used for

Question! Does the keys dumped with lockpick change on every firmware? or are unique per console? Also, does this keys are the same as the device.keys? because i dumped in 6.2 using lockpick "prod.keys" and "title.keys" and also dumped "device.keys" using biskeudump and later after updating to 7.0 i dumped the prod.keys using lockpick. Thanks!

 

[LapCheong]

Question! Does the keys dumped with lockpick change on every firmware? or are unique per console? Also, does this keys are the same as the device.keys? because i dumped in 6.2 using lockpick "prod.keys" and "title.keys" and also dumped "device.keys" using biskeudump and later after updating to 7.0 i dumped the prod.keys using lockpick. Thanks!

Please someone correct me if i am wrong

biskeydump is console specific and is unique
biskeydump exist in "prod.keys"
prod.keys also includes master_key which is not console specific

 

[jorgesd]

Please someone correct me if i am wrong

biskeydump is console specific and is unique
biskeydump exist in "prod.keys"
prod.keys also includes master_key which is not console specific

those keys, indifferent if them are console or not, needs to be dump when i change my firmware or not?