BIOS firmware for the X455LJ notebook mainboard revision 3.1, delivered as a 3.35 MB ZIP; the model code matches the ASUS X455 line, though no brand is stated in the name. Such dumps are programmed into the SPI flash with a CH341A or similar tool to revive a laptop that powers on without image or after a failed update. ASUS often produces several board revisions per model, so check that the PCB reads Rev 3.1, back up the original chip first, and ensure the image fits the chip size.
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 →