1. FXDX

    OP FXDX GBAtemp Regular
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    Hello guys

    Today i did the rawnand dump, to a corrupted Switch eMMC chip. Console displays Blue Screen of Death. With the help of the Low Voltage eMMC Adapter, Transcend Card Reader and NxNandManager, i managed to do a full dump. I ordered a new 32Gb SanDisk eMMC.
    The original eMMC chips also have boot partitions, respectively boot0 and boot1.
    I didn't have access to boot partitions with an eMMC Adapter and SD card reader.The controller on SD reader doesn't support eMMC boot mode.
    It must be used a SDIO controller, and the eMMC boot partitions they will be visible, but i think i can generate them with ChoiDujour for Pc and then transferred to the new eMMC on the switch, or will i buy one BeagleBone Black, SDIO interface or i'll try a laptop that has SDIO interfaces for SD card reading.
    I'll be back with new information in a few days. I apologize for my bad English.

    0.jpg 1.jpg 2.jpg 3.jpg 4.jpg 5.jpg IMG_5717.PNG IMG_6238.JPG
     
  2. vastrolorde

    vastrolorde Advanced Member
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    Can this be done using a regular Micro sd adapter? just like what we used back then on the 3ds, to dump the NAND?

    [​IMG]
     
    Last edited by vastrolorde, May 12, 2020
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  3. Hayato213

    Hayato213 GBAtemp Guru
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    Not quite necessary, prior to NTRBoothax, the only way to recover from a hard brick is with hard mod and a NAND backup prior to bricking, even if you got blue screen switch you can still re-write NAND to it if you have a proper NAND backup, The low voltage emmc adapter is nice but it is too much work, it can be considered as a last resort.
     
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  4. vastrolorde

    vastrolorde Advanced Member
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    actually my switch,s problems is kinda weird, its not Bluescreen, but shorted caps, when emmc module is connected on the board, all shorts gone, after removing it. so maybe, i just thought that this method might work. so i can replace it with a good working emmc module.
     
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  5. Hayato213

    Hayato213 GBAtemp Guru
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    You could replace the emmc, with a new one as long you have your NAND backup and the correct boot0/boot1 to rewrite it to.
     
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  6. NaniMael

    NaniMael Newbie
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    Is it possible with a regular SD adapter?
    Do I have to use low-power products?
     
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  7. SheriffBuck

    SheriffBuck Advanced Member
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    @FXDX - Any progress on this? I've got a patched Switch with a BSOD, so interested in how far you got.
     
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  8. FXDX

    OP FXDX GBAtemp Regular
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    I could not generate the eMMC boot partitions boot0 / boot1 with ChoiDujour. So far i have not advanced with the Low Voltage eMMC Adapter project.....
     
  9. Dark Ronin

    Dark Ronin GBAtemp Regular
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    You should borrow an unpatched one, swap eMMCs and dump it using payload, write back to good eMMC and swap things back.

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

    I bet you should ask somebody to dump them for you from a good working unit with your FW version.
     
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  10. FXDX

    OP FXDX GBAtemp Regular
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    I don't know if unique data for each console is not written to the boot0 and boot1 partitions.
     
  11. Dark Ronin

    Dark Ronin GBAtemp Regular
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    AFAIK they're not console unique but FW only.
    Someone around (@mattytrog IIRC) had collection of them for repair purpose.
     
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  12. LIY2012

    LIY2012 Member
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    BOOT1 is the same for every console. BOOT0 has some encrypted key data that is console specific, but I don't know if the newer firmwares (6.2+) need it or not.

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

    Check the datasheet for the memory chip. I'm sure there are different suppliers, but the samsung chip on mine will work at 3.3 or 1.8 volts.
     
  13. ThiagoDaruma

    ThiagoDaruma Member
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    I was successful in rebuilding boot0 and boot1 on a console that had the perfect nand. now i have a switch with a corrupted nand, the console turns on as if there was no nand connected to it. there are no shorts on the board. I would like to try the hard dump, would it be possible to do with an SD adapter? (I think I still have mine from the 3DS era)
     
  14. FXDX

    OP FXDX GBAtemp Regular
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    Of course not.
     
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