Circuit diagram in PDF form for the MS-7395 board, revision 0A, around 1.15 MB. The number follows the MS-7xxx style MSI uses for its desktop mainboards, though the brand is not confirmed by the input. Technicians use such a schematic to follow voltage regulators, power-on logic, chipset rails and connector pinouts while hunting faults or shorts. Revision 0A is typically pre-production, so check the revision printed on the PCB and expect possible differences on later boards.
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.