PDF schematic for the board numbered MS-N0141, with the suffix 0A most likely indicating its revision. The MS- prefix follows MSI's internal board numbering, which MSI uses for its own products and for boards it builds for other brands. The document helps a technician trace power sequencing, identify the components on each rail and diagnose shorts or missing voltages. Before relying on it, compare the board number and revision printed on the PCB with the schematic title block, because different revisions can differ in parts and values.
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 @pepeelectronica. Enginerys does not host this file.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.