Lenovo Z500 BIOS dump, the 2 MB part, marked OK in the name. It pairs with a 4 MB image, so the board appears to use two SPI chips, one for each image. Use a programmer to write this file to the smaller 16 Mbit flash when repairing a no-POST or bricked Z500. Keep the images on the correct chips, confirm sizes match each part exactly, read and store the original contents before erasing, and check the board number printed on the PCB against your unit.
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 @biosarchive. 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 →