Lenovo G50-30 BIOS archive of 2.45 MB for the NM-A311 motherboard, with the ACLU9 and ACLU10 board designations named alongside it. NM-A311 follows the numbering used by LCFC, Lenovo's own board manufacturing operation. The dump is meant for reflashing the SPI BIOS chip with an external programmer when the notebook fails to start or shows corrupted firmware. Make sure the NM-A311 label on the PCB matches, save a copy of the existing chip contents, and confirm the extracted image size fits the installed flash chip.
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 →