Thanks for the reply.

Just to clarify: this laptop has already been through multiple repair shops, and several different BIOS files have been flashed to it — none of them worked. Unfortunately, in the country I live in, getting access to verified BIOS files is very difficult due to various limitations.

At this point, I'm only looking for a verified, clean BIOS dump that exactly matches my machine:
- Model: Lenovo Legion S7 15ACH6
- Serial Number: PF2XWM03

If you or anyone else has a known-good dump from a working unit of the same model, I would...

Same issue for me. My laptop got a power failure during bios updating and now it won't power on at all.
Lenovo Legion S7 15ACH6
S/N: PF2XWM03

Thak you in advance.