BIOS for blind flash Yoga 7 14ACN (82N7) 5800U

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  • xiongnemo
    New Member
    • Apr 2024
    • 4
    • Australia
    #1

    BIOS for blind flash Yoga 7 14ACN (82N7) 5800U

    I misconfigured my UEFI settings and it now won't POST. Removing CMOS battery is of no use. I tried to put BIOS.fd in and use Fn + R to blind flash, but also no use. The charging light just flashing amber while ESC and CAPS LOCK turned off and on every 5 or maybe 7 times when charging light flashes. I wonder whether my extraction from Lenovo website suits this occasion and if not, maybe someone of you will have one?
    Many thanks!
    Tags: None
    • SMDFlea
      Super Moderator
      • Jan 2018
      • 20361
      • UK
      #2
      RULES UPDATE for BIOS requests/offers AVOID BANNING, READ BEFORE POSTING
      https://www.badcaps.net/forum/troubl...before-posting

      ​
      All donations to badcaps are welcome, click on this link to donate. Thanks to all supporters

        Comment

        • xiongnemo
          New Member
          • Apr 2024
          • 4
          • Australia
          #3
          Sorry for the inconvenience!

          MO: PFNNXB1531076
          S/N: PF2YJWP8 (Chinese Version)
          MB P/N: 5B21C81146
          On the same label with MB P/N: 885B21C81146L1HF15PB0DZ
          '46J SN TXT Code; on MB: 15414038004384511GK1210G HYG40 10D2
          BIOS Chip seems to be 74M12JWSIQ​

            Comment

            • xiongnemo
              New Member
              • Apr 2024
              • 4
              • Australia
              #4
              In my estimation, the issue should be resolved either with a successful blind flash or resetting the nvram after I manage to get a dump of the original chip.

                Comment

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