RAR archive of 152 KB labelled N53TA with revision 2.0; the name does not specify the exact content type. A file this size commonly contains boardview data rather than a full schematic or BIOS image, so inspect it after extracting with 7-Zip or WinRAR. If it is a boardview, load it in OpenBoardView or FlexBV to locate parts, view net connections and find measurement points when chasing a fault. Check that your motherboard carries the N53TA 2.0 marking so component positions line up with the layout.
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 @cyberlanelectonik. 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.