Boardview for the N73SV mainboard, revision 2.0, packed in a RAR of about 215 KB. Boardview files show the physical placement of components, pins and test points with net names, and are opened in viewers such as OpenBoardView, FlexBV or similar tools. They are used alongside a schematic to locate a shorted part, find where to measure a rail, or identify a missing component. Confirm the revision on your PCB is 2.0 so the layout matches.
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.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.
7-ZipWinRARThe Unarchiver (macOS)