Lenovo BIOS dump for the NM-F331 motherboard, revision 1.0, labelled OK by the source, meaning it was reported working. NM-prefixed board numbers belong to LCFC, the Lenovo-owned ODM. The RAR archive is 7.79 MB, so extract it and compare the image size with the capacity of the SPI flash chip on the board before writing. A technician reflashes such a dump with a programmer like the CH341A to revive a board with corrupted firmware. Read and save the original contents first and check the revision printed 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 @schematiclaptopramkushwaha. 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 →