ASUS FX506IH laptop boardview linked to board number DA0BKXMB8D0, which follows the Quanta numbering scheme, meaning Quanta designed and built the PCB. Packed as a 370 KB RAR, it contains the layout used to locate components, follow nets between chips and pick test points during power-on and short diagnosis. Open it with a viewer like FlexBV or OpenBoardView, and check that the number and revision letter printed on your mainboard match DA0BKXMB8D0 before trusting the placement data.
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.