Lenovo Z510 BIOS firmware, a RAR archive of roughly 3.07 MB, with no board number, revision or version shown in the name. Extract it to see whether it holds a raw flash dump or an update package. Repair shops use such images to bring back a board that will not POST after a failed update or flash corruption, writing the raw image to the SPI chip with a programmer such as a CH341A. Compare the image size with the chip capacity and keep a full backup of 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 @biosbigarchives. 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 →