Firmware archive for the Lenovo Z50-70 on board ACLU/ACLUB NM-A273, revision 1. The NM- number is LCFC's scheme for Lenovo-designed boards, and ACLU is the board code name. Packaged as a 3.19 MB ZIP, it should contain an image for the SPI flash. Extract it and confirm the size matches the chip before programming with an external tool. Check that the PCB carries NM-A273 and the same revision, and back up the original contents before writing.
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 →