Asus X550CA dead after BIOS-flash

Discussion in 'BIOS Mods' started by Lutschpuppe, Oct 1, 2017.

  1. Lutschpuppe

    Lutschpuppe MDL Junior Member

    Dec 23, 2014
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    Hello,

    i got an ASUS laptop X550CA which is complete dead. No signs of light/noise when pushing the switch or keyboard.

    The laptop switches off when updating the bios, ac adapter and battery where pluggend in and fully charged. The update was installed with AFUDOS and i remember it switches off during erasing some block or module........
    But before i flashed the bios i saved the old bios.

    Any suggestions for recovery?
     
  2. Lutschpuppe

    Lutschpuppe MDL Junior Member

    Dec 23, 2014
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    Not working. :(
     
  3. LatinMcG

    LatinMcG Bios Borker

    Feb 27, 2011
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    ch341a programmer and maybe sop8 test clip or desolder it.
     
  4. Lutschpuppe

    Lutschpuppe MDL Junior Member

    Dec 23, 2014
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    I have CH341a and soldering iron.

    Is it possible to repair or reflash bios? Because some values are stored permanent (mac, serial no., OA3-Key). I will post the left data content of the eeprom.......
     
  5. LatinMcG

    LatinMcG Bios Borker

    Feb 27, 2011
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    make 2 backup.bin first..
     
  6. LatinMcG

    LatinMcG Bios Borker

    Feb 27, 2011
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    try cleaning Intel Management engine.
     
  7. Lutschpuppe

    Lutschpuppe MDL Junior Member

    Dec 23, 2014
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    Hello,

    is there a how-to?
     
  8. Lutschpuppe

    Lutschpuppe MDL Junior Member

    Dec 23, 2014
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    Thanks, but i can't read this, because i'm not at facebook.
     
  9. Lutschpuppe

    Lutschpuppe MDL Junior Member

    Dec 23, 2014
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    #16 Lutschpuppe, Oct 26, 2017
    Last edited: Oct 26, 2017
    (OP)
    Success! Its working now!

    But serial and Windows-key is from the donor-system and in AIDA64 it shows a different model-type. And the fan is running on max rpm all the time. Possible to fix it?

    Ok, what i did:
    -bios-update with AFUDOS to latest and now correct version (model X550CAAS instead of X550CCAS)
    -in AFUDOS the /E and /EC-commands for updating/flashing EC not working, because not found
    -with AMIDEDOS reading dmi-data is possible, but not editing the serial. It shows for EC-version "FF".
     
  10. Lutschpuppe

    Lutschpuppe MDL Junior Member

    Dec 23, 2014
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    #17 Lutschpuppe, Oct 27, 2017
    Last edited: Oct 27, 2017
    (OP)
    Next try (Asus-biosses are complete crap, i'm f**ked up with this s**t):
    -DMI and windows-Key seems to be stored in the saved rom (=Bios region) before the machine bricked.
    -It can also extracted with UEFI-Tool from a SPI-dump
    -a UEFI image for bios-updates has an empty padding (size 500000h) instead.
    -It isn't possible to flash the saved rom/Bios region complete with AFUDOS.
    -Also not possible with FPT, which has the ability to flash also DMI-data, because of the Asus security check/locked bios
    -SCEDOS isn't able to create nvram.txt, which could be used for unlock bios.

    So i will try to build a new spi-image, combined new spi-dump and old DMI-data.......perhaps it'll work. o_O
     
  11. tonto11

    tonto11 MDL Addicted

    Jun 18, 2012
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    LatinMcG to the rescue again, You are the man.
    Took me 2 years to dig myself out of one of these bios messes with his help
    Eventually you will find something as close to what you want as you can get
    with the least amount of obnoxious side effects,

    ,,,T
     
  12. Lutschpuppe

    Lutschpuppe MDL Junior Member

    Dec 23, 2014
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    #19 Lutschpuppe, Oct 28, 2017
    Last edited: Oct 29, 2017
    (OP)
    Solved!

    I'm sure that the bios-region was corrupted, cleaning me-region didn't help.
    Here my solution:
    -flashing SPI-Image from LatinMcG -> wrong model, different serials, different MSDM-key, fan running on full blast
    -flashing factory-bios with AFUDOS -> correct model, but still problems, see above
    -flashing the saved rom (before brick) with AFUDOS -> downgrade
    -saved the SPI-Image with programmer, FPT isn't able to read the full content
    -replace the DMI-region with the extracted from the saved rom. I did it with UEFI-Tool, but it is also possible to do it manually.
    -at offset 0x60 i changed to 00 00 FF FF 00 00 FF FF 18 01 FF FF. This is for unlocking region in ME, otherwise FPT can't read full SPI-content.
    -programmed SPI, working, serials, key, model: correct
    -update to latest BIOS-version with EasyFlash
    -applied SLIC with "X550CA_mod_All"
    -After flash CSM-mode was gone: Saved rom with FPTW
    -edited with AMIBCP
    -flashed bios with FPTW
    -CSM-mode and secure-boot-option enabled again.
    -finished (so far)