1. mizou84

    OP mizou84 Newbie
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    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 !
     
    Last edited: Dec 18, 2019
  2. pLaYeR^^

    pLaYeR^^ Doctor Switch
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    You should still be able to boot to RCM with a jig.
     
  3. mizou84

    OP mizou84 Newbie
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    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"
     
    Last edited: Dec 18, 2019
  4. wartutor

    wartutor GBAtemp Regular
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    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.
     
    Last edited: Dec 18, 2019
  5. pLaYeR^^

    pLaYeR^^ Doctor Switch
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    Can you boot to OFW?
     
  6. mizou84

    OP mizou84 Newbie
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    I can't boot neither to OFW

    — Posts automatically merged - Please don't double post! —

    I can't, since there is no possibility to enter RCM
     
  7. pLaYeR^^

    pLaYeR^^ Doctor Switch
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    Try to hold the power button for 15 seconds.
     
  8. mizou84

    OP mizou84 Newbie
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    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
     
  9. wartutor

    wartutor GBAtemp Regular
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    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.
     
  10. pLaYeR^^

    pLaYeR^^ Doctor Switch
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    But you should still be able to enter RCM.
    How do you inject Hekate?
     
  11. mizou84

    OP mizou84 Newbie
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    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..
     
  12. pLaYeR^^

    pLaYeR^^ Doctor Switch
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    Is the switch even charged? If you left it in RCM, maybe the battery is 100% drained.
     
  13. mizou84

    OP mizou84 Newbie
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    PC and TegraRcmGui. When I enter RCM then I inject hekate

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    Battery is full :cry:
     
  14. pLaYeR^^

    pLaYeR^^ Doctor Switch
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    Really weird... A downgrade can't "destroy" RCM. Maybe try a dongle or your smartphone or a different computer to inject hekate.
     
  15. mizou84

    OP mizou84 Newbie
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    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..
     
    pLaYeR^^ likes this.
  16. mizou84

    OP mizou84 Newbie
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    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..

    — Posts automatically merged - Please don't double post! —

    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
     
    Last edited: Dec 19, 2019
  17. minooch_e

    minooch_e Member
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    You can't break RCM access. It is probably just flat. Leave it on the charger for a few hours and then try again
     
    Draxzelex and pcwizard7 like this.
  18. issayloki

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