Big-chip BIOS dump labelled B560, likely the Lenovo B560 model, 4 MB raw binary marked OK as a working image. It is tagged for an Nvidia N11M-GE2-S-B1 GPU and the Intel HM55 chipset, so it suits the discrete-graphics configuration. A dump like this is written to the main SPI flash with a programmer such as a CH341A when a board fails to start. Confirm the GPU marking, the chipset and the 32 Mbit chip size first, and keep a backup of the original read before erasing anything.
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 @biosbigarchives. 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 →