Lenovo BIOS dump for a laptop built on LCFC board NM-B931, supplied as a 32 MB raw binary called lock.bin. The name hints that the image may carry a locked state, such as a supervisor password or a security lock, but it does not say so clearly, so treat its condition as unverified. NM-B931 follows the LCFC numbering that Lenovo's own ODM uses. Read and save the original SPI chip with a programmer before writing, confirm the chip is 32 MB, and check that the PCB number matches.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @zinfoservicebios. Enginerys does not host this file.
How to open a .bin file
A raw, byte-for-byte image of a flash chip: the main BIOS / UEFI, the embedded-controller (EC) firmware, or both.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →