BIOS backup for a Lenovo laptop on LCFC board NM-D031, compressed into a 6.58 MB RAR. LCFC is Lenovo's own ODM, and its boards use the NM-xxxx numbering seen here. A dump like this restores firmware on a board with a corrupted SPI flash and is written with a programmer such as a CH341A or RT809. Extract it and check that the image size matches the chip on your board. Read and save the existing contents before writing, because system-specific data may differ.
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 →