RAR archive of 136 KB for the ASUS X555LD laptop, tagged 2.0, which probably refers to the board revision. Nothing else in the name states what is inside, so open it to see whether it is firmware, a boardview or another repair file. A file this small often matches an embedded controller image rather than a full BIOS. Before use, compare the revision silkscreened on the mainboard with this one, since ASUS revisions of the same model can differ in layout and firmware, and keep a backup of any chip you reprogram.
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 @schematicslaptop. Enginerys does not host this file.
All sources (18)
The same file was posted more than once. If one link is dead, try the next.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.