Lenovo BIOS firmware identified by the version string GLCN41WW, associated with the LCFC board NM-D521, packed in a 5.32 MB RAR archive. LCFC is Lenovo's own ODM and uses NM-xxxx numbers on its mainboards, while the WW suffix denotes Lenovo's worldwide BIOS builds. Contents may be an update package or a raw chip image, so check before flashing. For programmer use, back up the existing SPI chip, confirm the image size equals the chip capacity and match the board number 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 @schematiclaptopramkushwaha. 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 →