ASUS X756UV BIOS Bricked?

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  • kraZZeman
    New Member
    • May 2024
    • 8
    • Poland

    #1

    ASUS X756UV BIOS Bricked?

    Hello, I have a problem with starting my laptop. I got a laptop that doesn't start. It turned out that it was flooded with liquid. I removed the corrosion, replaced the damaged elements and the laptop started. Before I understood what the problem was, I uploaded a new BIOS with a clean ME region downloaded from this forum. The laptop started and worked. However, I decided to upload the original BIOS back. I cleared the ME REGION in it and uploaded it to the chip. After this procedure, the laptop stopped starting. It uses 6 watts constantly without any changes. Also, uploading back the BIOS with which it started after repair doesn't help. Is it possible the KBC chip is bricked? I don't have a programmer for KBC systems. Do you have any ideas? Thanks!
  • mcplslg123
    Badcaps Legend
    • Jun 2015
    • 7262
    • india

    #2
    KBC firmware is unlikely to be corrupt. Check whether chip is properly soldered and do check for any missing resistors nearby.

    Comment

    • kraZZeman
      New Member
      • May 2024
      • 8
      • Poland

      #3
      I have checked this before. Everything with resistors and capasitors is fine. Like I said before flashing it was working properly. So i need to find a way to flash KBC it seems...

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      • mon2
        Badcaps Legend
        • Dec 2019
        • 14035
        • Canada

        #4
        Is the EC rom internal or external on this board? My database shows a dump for this model which I can post if needed.

        Click image for larger version

Name:	ec_rom.png
Views:	52
Size:	4.3 KB
ID:	3572424

        Comment

        • SMDFlea
          Super Moderator
          • Jan 2018
          • 20731
          • UK

          #5
          Originally posted by kraZZeman
          I have checked this before. Everything with resistors and capasitors is fine. Like I said before flashing it was working properly. So i need to find a way to flash KBC it seems...
          Post the original bios backup in the bios requests forum - https://www.badcaps.net/forum/troubl...-requests-only ,and post the laptop serial number (type it please) ,and also post a picture of the barcode sticker on the ram slot
          All donations to badcaps are welcome, click on this link to donate. Thanks to all supporters

          Comment

          • kraZZeman
            New Member
            • May 2024
            • 8
            • Poland

            #6
            Originally posted by SMDFlea

            Post the original bios backup in the bios requests forum - https://www.badcaps.net/forum/troubl...-requests-only ,and post the laptop serial number (type it please) ,and also post a picture of the barcode sticker on the ram slot
            Thank you, I just did it.

            Comment

            • kraZZeman
              New Member
              • May 2024
              • 8
              • Poland

              #7
              Originally posted by mon2
              Is the EC rom internal or external on this board? My database shows a dump for this model which I can post if needed.

              Click image for larger version

Name:	ec_rom.png
Views:	52
Size:	4.3 KB
ID:	3572424
              I'm sorry, but because I don't have any programmer for KBC I don''t have enough knowledge about what it means internal or external ROM.

              Comment

              • mon2
                Badcaps Legend
                • Dec 2019
                • 14035
                • Canada

                #8
                Wait on others to comment but from this video, the EC ROM chip is an external part. That is, the EC controller = KB9026Q is the controller and it uses the external Winbond chip to hold the firmware (program). If indeed, this external flash device is corrupted, then a known good EC rom dump should be suitable to apply onto this target flash chip.

                https://www.youtube.com/watch?v=CgDV2oxQhsI

                This YT video is using the u-Link NT Programming tool and from a quick Aliexpress search, someone is attempting to gouge the buyer @ $3k for this device worth about $5. Suspecting there are many options to reflash this target memory device including the option to remove this flash chip -> program with the device with a low cost tool and then solder it back.

                Confirm if you have this flash device on your board like showing in the video when he flips the board over.

                Comment

                • mcplslg123
                  Badcaps Legend
                  • Jun 2015
                  • 7262
                  • india

                  #9
                  Once again i'm saying its not EC bios. EC has a separate flash chip and the ec bios is not pulled from main bios in this case.
                  Since you only flashed main bios, it has nothing to do with ec bios.

                  Rather, look carefully at liquid spill area and you may get a clue.

                  Comment

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