Hacking Nintendo Switch possibly bricked after Downgrade

mizou84 · Dec 18, 2019

Hello community,

I have downgraded my Switch from 9.1 to 8.0.1 using ChoixDuJour. The autoRCM was deactivated and unfortunetly now, the Nintendo Switch won't boot even on Recovery Mode (RCM). I have backups of the Switch NAND and keys but I can't restore because the Switch seems to be dead.
Is there any chances to recover it?
Thank you for your Help !

pLaYeR^^ · Dec 18, 2019

You should still be able to boot to RCM with a jig.

mizou84 · Dec 18, 2019

pLaYeR^^ said:
You should still be able to boot to RCM with a jig.

Thank you @pLaYeR^^ for replaying so quickly.
I am trying to boot with my jig since then without success !!
May be the downgrade caused a hardware failure :cry:

P.S. I am using TegraRcmGUI 2.6 : "No RCM device detected"

wartutor · Dec 18, 2019

You can rebuild your nand with 9.0 firmware and inject it with hekate theres a few guides around somewhere on gbatemp that can walk you through it luckly u have your keys also how did you upgrade to 9.0 did you use choixdujour or upgrade normally.

pLaYeR^^ · Dec 18, 2019

mizou84 said:
Thank you @pLaYeR^^ for replaying so quickly.
I am trying to boot with my jig since then without success !!
May be the downgrade caused a hardware failure

Can you boot to OFW?

mizou84 · Dec 18, 2019

I can't boot neither to OFW

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wartutor said:
You can rebuild your nand with 9.0 firmware and inject it with hekate theres a few guides around somewhere on gbatemp that can walk you through it luckly u have your keys also how did you upgrade to 9.0 did you use choixdujour or upgrade normally.

I can't, since there is no possibility to enter RCM

pLaYeR^^ · Dec 18, 2019

mizou84 said:
I can't boot neither to OFW

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I can't, since there is no possibility to enter RCM

Try to hold the power button for 15 seconds.

mizou84 · Dec 18, 2019

it's definetely a problem with the eFuses and the installed FW: downgrading and booting in OFW causes the panic mode.. Is there something to do to fix it?

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pLaYeR^^ said:
Try to hold the power button for 15 seconds.

I tried.. nothing

wartutor · Dec 18, 2019

Hard power it off by holding down power for 30s then put in a micro sd with only hekate on it and try to rcm into it.

pLaYeR^^ · Dec 18, 2019

mizou84 said:
it's definetely a problem with the eFuses and the installed FW: downgrading and booting in OFW causes the panic mode.. Is there something to do to fix it?

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I tried.. nothing

But you should still be able to enter RCM.
How do you inject Hekate?

mizou84 · Dec 18, 2019

the thing is: to enter RCM with the jig, I used to have a green box on TegraRcmGui.. now I just see the red box with no RCM on it and the message above..

pLaYeR^^ · Dec 18, 2019

mizou84 said:
the thing is: to enter RCM with the jig, I used to have a green box on TegraRcmGui.. now I just see the red box with no RCM on it and the message above..

Is the switch even charged? If you left it in RCM, maybe the battery is 100% drained.

mizou84 · Dec 18, 2019

pLaYeR^^ said:
But you should still be able to enter RCM.
How do you inject Hekate?

PC and TegraRcmGui. When I enter RCM then I inject hekate

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Battery is full :cry:

pLaYeR^^ · Dec 18, 2019

mizou84 said:
PC and TegraRcmGui. When I enter RCM then I inject hekate

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Battery is full

Really weird... A downgrade can't "destroy" RCM. Maybe try a dongle or your smartphone or a different computer to inject hekate.

mizou84 · Dec 18, 2019

I will try it from a friend's smartphone running under Android. He has an unpatched Switch too, we will see if it enters RCM from my PC..

mizou84 · Dec 19, 2019

The other Switch goes to RCM on my PC and with my jig. The Problem is definetly on my Switch. When I connect it to the PC, there is nothing that happens and it is not even recognized as a usb device..

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I think I have to open it and check the voltage in different parts of the circuit.. may be something on the hardware is broken, since I can't enter even into RCM

minooch_e · Dec 19, 2019

You can't break RCM access. It is probably just flat. Leave it on the charger for a few hours and then try again

issayloki · Dec 20, 2019

Usb Controller chip might die, since PC not detect while connect usb.

Hacking Nintendo Switch possibly bricked after Downgrade

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