T15g Bricked BIOS - Which chip has the BIOS?

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  • h3ct0r
    New Member
    • Oct 2024
    • 3
    • UK
    #1

    T15g Bricked BIOS - Which chip has the BIOS?

    Hello, after what is seems like a bad BIOS firmware upgrade, the machine had extrange visual glitches and froze.
    The laptop now does not turn on as normal, and does not make post or show the BIOS page: It will stay at a blank page with beeping sounds: https://youtu.be/OC2o9_b1RQ0

    I'm planning to flash the bios chip with a CH341A, but it seems that they are three chip candidates:
    1. Winbond 25Q80DVSIG (3V 8M-bit) Located on the GPU board
    2. MXIC 25U8035F (1.8V 8M-bit) Located on the GPU board
    3. Winbond 25Q80DVNIG (3V 8M-bit) Located on the CPU board
    4. Winbond W25Q256JV (3V 256M-bit) Located on the CPU board
    Which one is more probable of being the BIOS chip? I have attached a picture of the mainboard where the chips are located.

    Laptop details:
    • Model: Lenovo T15g Gen 1
    • Type: 20UR-0038UK
    • Board: GP540/GP740
    • Proc: i7 10750H
    Thanks!!
    Attached Files
    Last edited by h3ct0r; 10-11-2024, 09:12 PM.
    Tags: None
    • ktmmotocross
      Boardkiller
      • Feb 2014
      • 3597
      • slovakia
      #2
      th biggest is main bios

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