Quanta ZHT motherboard documentation, revision 1A, for an Acer Electro Parma based machine, with the full board number DA0ZHTMB6F0 stated in the name. The 809 KB RAR most likely contains a schematic, possibly with boardview data. Quanta part numbers starting with DA0 followed by the project code and MB identify the bare PCB, and this string is printed on the board itself. Check that it matches before you rely on these diagrams to trace signals, find failed MOSFETs or measure voltages at the specified test points.
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 @IT_SERVICE_WORLD. 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.