Lenovo firmware package for the FYG50 project on LCFC board NM-C433, containing both a 16 MB BIOS image and EC firmware. Having the embedded controller code alongside the main BIOS helps when a board shows no power, fan or keyboard activity caused by a corrupt EC. The BIOS must go onto a 16 MB SPI chip; a smaller or larger part will not accept it. Use a programmer to back up the existing chip before flashing, and confirm NM-C433 on the PCB.
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 →