Model: ThinkPad T480
Serial Number: PF-1NSAAJ
Motherboard Model: ET480 NM-B501 - rEV. 1,0 - 2018-03.03

Issue:
I am unable to remove the BIOS supervisor password. I have tried all recommended procedures, including the Lenovo Auto‑Patcher, but I am still locked out.

What I have tried:

Used Flashrom and a CH341A SPI programmer to read and write the BIOS chip.

Worked from both Ubuntu and Windows 11 operating systems during the process.

Flashed both 8MB and 4MB dumps (attached below).

Ran the latest Lenovo...

I just saw that I uploaded the file, but it's 6MB. The original BIOS is 16MB, but when I run the autopatcher, it doesn't work and the siren is activated....

Can someone help me? When I use the autopatcher, the computer starts beeping and does not start the BIOS....