Firmware archive named for the G580, 2.92 MB in RAR format, with no brand, board number or revision in the name, although G580 is a known Lenovo model. That laptop exists on more than one mainboard, so identify the board code on the PCB before using this image. A file like this is used to recover a non-booting unit by writing the BIOS chip with a hardware programmer. Extract and inspect it, save the original chip read, and confirm the image size matches the flash.
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 .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 →