Lenovo IdeaPad Z410 BIOS image marked OK, meaning it was reported as working. The 4 MB dump matches a 32 Mbit SPI flash; a separate 2 MB Z410 file in the index suggests this model uses two chips, with this image for the larger one. The board revision is not given, so check the PCB before writing. Program it with an external tool such as a CH341A, after reading and saving the original contents, when the laptop fails to start following a corrupted update.
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 →