BIOS archive for the ASUS X550JX notebook, with the name noting an Intel Core i5 configuration and a 2.0 tag, most likely the mainboard revision. The 3.45 MB zip should contain an SPI flash image for reprogramming the BIOS chip with an external programmer when the laptop will not POST or the firmware is damaged. Verify that the CPU variant and board revision printed on your PCB match. Dump and keep the original contents before erasing, and check that the file size equals the flash 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 .zip file
Compressed archive that every operating system opens without extra software.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →