BIOS image for the Lenovo G500 in .rom format, 4.50 MB in size. The name gives no board number, version or revision. Because 4.5 MB does not match a standard flash capacity, this is probably an update or extracted image rather than a raw dump ready to burn to a chip, so check its structure in a tool like UEFITool first. Raw images go onto the SPI chip with a programmer; back up the original first, as a file whose size differs from the chip will not fit.
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 .rom file
A BIOS image as shipped by the vendor (commonly AMI) — often the BIOS region only, without descriptor or ME.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →