Boardview for the ASUS X1404ZA motherboard, revision 3.0, compressed into a 241 KB RAR archive. Boardview files show component placement, part designators, nets and pin connections, letting a technician find test points, trace power rails and locate shorted capacitors without the physical schematic beside them. Such files are opened in viewers like OpenBoardView, FlexBV or Boardviewer, depending on the internal format. Before relying on it, make sure the revision silkscreened on the PCB reads 3.0, since layouts change between revisions.
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 @schematiclaptopramkushwaha. 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.