BIOS firmware for the Lenovo ThinkPad X390 Yoga, machine type 20NN, supplied as a 10.8 MB RAR archive. The name gives no BIOS version or board number, so inspect the contents and compare chip sizes before choosing an image. Dumps like this are used to recover boards that are bricked or stuck at power-on, by writing directly to the SPI flash with an external programmer. Always save the existing chip first so the machine-specific data is not lost.
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 @biosfilebins. 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 →