BIOS package for a Lenovo board coded NM-C661 revision 1.0, with GX490 given as the project name, in a 13.6 MB ZIP archive. The NM- prefix is the numbering used by LCFC, Lenovo's own notebook manufacturing arm. The archive size suggests more than one image or a large flash chip, so open it and check what is inside before choosing a file. These dumps are written to the SPI flash with a programmer to recover a board that will not post. Match the NM code on the PCB and back up the existing chip first.
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 .zip file
Compressed archive that every operating system opens without extra software.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →