ASUS BIOS archive for the X551CA laptop at board revision 2.2, compressed as a 3.62 MB RAR. ASUS prints the model and revision on the motherboard, and that marking must read 2.2 before this dump is trusted, as other revisions can use different firmware. Extract the archive and confirm the image size matches the SPI flash chip. A technician typically uses such a file to recover a board that powers on without display, writing it with a programmer after saving the existing chip contents.
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 →