Lenovo G500 BIOS image, second copy, 4.50 MB in .rom format. No board number or BIOS version is included, and G500 boards were made in more than one variant, so verify the number printed on the PCB. The unusual size suggests a dump covering more than one chip, or an image with extra data, which must be split or trimmed to fit the actual flash device. Use a hex editor to check the layout. Save the original contents with your programmer before writing 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 @biosarchive. 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 →