BIOS dump, spelled BOS in the name, for Lenovo laptops on the JV471 and JV571 platform, motherboard NM-E361 revision 1.0. The NM- prefix follows the numbering used by LCFC, the Lenovo-owned design and manufacturing company, so the board number on the PCB is the reliable reference. The 7.99 MB RAR should be extracted and the image size checked against the SPI flash chip before programming. Write it with a hardware programmer only after saving the original contents, and verify the result to rule out a bad clip contact.
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 →