BIOS package for the ASUS X540SA notebook on mainboard revision 2.1, described as working and fully tested. The RAR archive weighs 15.2 MB, so it may hold more than one image or a large dump; check what is inside before programming. Such files are used to reflash the SPI chip with an external programmer when a unit will not post or lost its firmware. Make sure the board revision reads 2.1, that the image size equals the chip capacity, and save the original contents before erasing.
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 @schematiclaptopramkushwaha. 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 →