BIOS archive for a Lenovo laptop built on board NM-B241, marked ok in the name, which points to a dump reported as working. The NM-xxxx numbering is the scheme used by LCFC, the Lenovo-owned board maker that took over Compal-style codes for Lenovo designs. The 4.94 MB RAR has to be unpacked before use, and the image inside should match the SPI chip capacity. Read and keep the original chip contents before programming, and confirm the board number and revision silkscreened on the PCB.
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 @biosarchive. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →