Hacking Help, black screen after nintendo logo (downgrade)

[Napsterae]

Hey i need your help guys.
I did a mistake and did a backup of rawnand and did not do to boot0/1 (7.0.0).
Did downgrade with choidNX to 6.2, had some error at boot (did some reading , had to initialze system downgrade from 7.0.0, Didnt know my mistake)
So i tried to restore nand, so i didnt have the boot files so now i am screwed.

Tried the manual downgrade with choi in pc. Found the keys.txt at eurasia and used it with 6.1 FW.
Did every step and now it boots the nintendo logo and then go black screen.

(deleted all files at system and user partitions to perform a system initialze and still no luck)

The switch is out of warranty and i need to somehow revive the thing.
If you can help i will be glad. Sorry for the trouble.

Yes i know i had to backup everything, at hekate it said (backup all nand, i thought it would include the boot files, i was wrong)

 

[Kubas_inko]

OMG people, stop downgrading when there is a CFW for 7.0.0 already!!!

Try recovery mode and update (probably with a wired connection) or reinitialize your console.:
- Hold volume up and down on boot.

Try safe mode (probably with a wired connection).:

- Safe Mode (since 4.0.0). Doesn't do much but boot up and download/install an update.
-- Initiated by elaborate key sequence (VolDn + POWER, shift VolDn to VolUp, release POWER.)
-- Displays a spinner block, and a progress bar.
-- If there is a WiFi (or ethernet?) connection saved, it will connect and download an update.
-- If there is an update downloaded/pending, it will install the update.

Rebuild your NAND again but go for 7.0.0/1

 

[Napsterae]

OMG people, stop downgrading when there is a CFW for 7.0.0 already!!!

Try recovery mode and update or reinitialize your console.:
- Hold volume up and down on boot.
Try safe mode.:

Rebuild your NAND again but go for 7.0.0/1

Can i rebuild for 7.0.0 ? at the guide it said it only supports 6.1

 

[Kubas_inko]

Can i rebuild for 7.0.0 ? at the guide it said it only supports 6.1

you can later update back to 7.0.0.

 

[Napsterae]

update ? i cant even boot. Black screen after nintendo logo like i said.

Any idea ? i cant get to maintenance mode, it dont start.

 

[Kubas_inko]

update ? i cant even boot. Black screen after nintendo logo like i said.

Any idea ? i cant get to maintenance mode, it dont start.

Rebuild your NAND.
Don't know if normal choidujour supports anything higher than 6.1.0 (I know that NX doesn't), but if it does, just rebuild the boot0/1.

 

[huma_dawii]

Rebuild your NAND again.

You are saying it like if he knows what to do.

Attach a tutorial or something.

 

[Kubas_inko]

https://guide.sdsetup.com/#/Manualchoidowngrade
Mixed it with another thread, that's why I didn't post it.

 

[Napsterae]

The manual downgrade guide at sdsetup ?
I did that, i am afraid that i did something wrong, since everyone says that guide saves the switch and i still cant boot.

 

[Kubas_inko]

The manual downgrade guide at sdsetup ?
I did that, i am afraid that i did something wrong, since everyone says that guide saves the switch and i still cant boot.

If you did exactly that, it might be a hardware damage (doubt it, but can be).
Maybe try it once more but probably do a backup right now.

 

[Napsterae]

i have a backup before the manual downgrade, but that didnt work as well since the boot files mismatch the rawnand.
I will try with a new copy of the fw 6.1, can be a bad fw copy. I am at the point that i try everything.

 

[Kubas_inko]

i have a backup before the manual downgrade, but that didnt work as well since the boot files mismatch the rawnand.
I will try with a new copy of the fw 6.1, can be a bad fw copy. I am at the point that i try everything.

You can try to rebuild the boot0/1 with choi.

 

[Napsterae]

Did the rebuild for boot files, happening the same.
I am out of ideas.

 

[huma_dawii]

Never fixed this? I just tried to help someone to follow that guide and well, nope... no luck, black screen after Nintendo logo.

 

[Napsterae]

I fixed that. Had to use 5.1 fw and it worked. And system initialize.