BIOS firmware for the ASUS X401U motherboard labelled X401U-M3, revision 2.0, supplied as a 2.08 MB RAR archive. Such an image is used to revive a board with corrupted firmware or a no-boot condition by writing the SPI flash with an external programmer such as a CH341A. Before flashing, check that the board name and revision on the PCB match, dump and save the chip already fitted, and make sure the extracted file size equals the chip capacity.
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 →