8 MB BIOS dump from a Lenovo IdeaPad 720S-13IKB on board NM-B491, noted in the name as read OK, meaning a clean read from the chip. NM-xxxx numbers follow the LCFC scheme, Lenovo’s own ODM. A full 8MB image like this can be written to the SPI chip with a programmer to recover a board with corrupted firmware. Note that a dump from another unit may carry its serial and system data. Confirm the board number, save your own chip contents first, and check the chip size.
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 @efibios. 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 →