ASUS S451LN laptop boardview for mainboard revision 2.0, packed in a 370 KB RAR archive. Only the model and revision are given, so check that the board on your bench is marked S451LN rev 2.0, because earlier revisions may differ in layout. Extract the file and open it in OpenBoardView, FlexBV or a similar viewer to see component placement, net names and pin assignments. Technicians use it to locate test points, trace power rails from the charger and regulators, and find the part responsible for a short.
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 @BoardSchematic. 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.