Nintendo Switch possibly bricked after Downgrade

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 !

 

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

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

 

I can't boot neither to OFW

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

 

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

 

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..

 

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

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Battery is full

 

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..

 

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