Dell Inspiron 5520 BIOS recovery help needed

Discussion in 'BIOS Mods' started by 11212, Dec 4, 2018.

  1. 11212

    11212 MDL Novice

    Jan 17, 2016
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    Hi!

    So the story is. The laptop's battery is dead, so I have tried to update BIOS from recovery mode. Extracted the .fd file from official BIOS updater with WinRaR, placed it on a FAT32 pendrive, and started the laptop with END key + plugging in power adapter to get in recovery mode. When the beeps finished, I have tried to turn it off with pressing power button, but it won't react. So waited for about 15 minutes, still nothing, pulled out power cable. After that, the laptop didn't do anything, can't turn it on, can't enter recovery, it's fully dead, just there is power on USB ports. I have disassembled it, flashed downloaded dumps to the SPI chips, and tried to turn it on. Still nothing.

    What I have missed, why it's not working? Any help is really appreciated.
     
  2. coleoptere2007

    coleoptere2007 MDL Guru

    Apr 8, 2008
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    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
  3. LatinMcG

    LatinMcG Bios Borker

    Feb 27, 2011
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    flash with spi programmer the bios chip and a good .bin dump.
    ohh u have.. umm did you make a backup.bin of original broken ?
    what programmer?
     
  4. jupiter999

    jupiter999 MDL Novice

    May 14, 2011
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    Your KB9012 internal flash has wrong data.
    You'll have to reflash KB9012.
     
  5. 11212

    11212 MDL Novice

    Jan 17, 2016
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    The BIOS chips were empty, so I have tried many dumps, none of them worked. Programmer is flashrom with rayer_spi.

    Is it possible to reflash KB9012 using the USB ports? The programmer doesn't detect it after connecting to keyboard connector.
     
  6. LatinMcG

    LatinMcG Bios Borker

    Feb 27, 2011
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    rayer spi.. unstable.
    Kb9012 not sure.. likely needs Rt809F programmer or something better than rayer home made.. try ch341a cheap