Quanta ZHNB package in a 2.61 MB RAR, identified only by the project code, so its exact contents are not given by the name. Quanta assigns codes like ZHNB to its laptop mainboard designs and prints them on the PCB, often beside a DA-series number. The archive may contain a schematic, a boardview or both; inspect it after extraction. Use the material for tracing power rails, checking component values and finding test points, but first verify the code and revision on your board match.
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.