Schematic for MSI board MS-7680 in PDF format; the file name gives no revision, so compare the drawing title block with the revision printed on the PCB. MSI marks its desktop motherboards with this MS-xxxx code, usually silkscreened between the expansion slots. The document helps trace standby and main power rails, CPU VRM circuits, clock and reset lines and front-panel signals, and it identifies components by reference designator when you are chasing a short or a missing voltage during repair.
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 @boardview. 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.