Working BIOS for the ASUS X540MA laptop mainboard at revision 2.0, according to the name, supplied as a 6.82 MB RAR archive. The working label suggests the image was read from a functioning board, which makes it a useful reference when a unit shows no display or loops on power-up. Flash it to the SPI chip with a hardware programmer. Before writing, check that the revision silkscreened on the PCB is 2.0, back up the existing chip, and make sure the image size matches the chip.
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 →