Original 1.0 revision schematic for the MSI MS-7A39 desktop board, 1.76 MB in PDF form. Compare it with the later 2.0 drawing if your PCB carries a newer revision mark, since parts and nets can change between issues. The pages show how standby and main rails are generated, how the PCH, Super I/O and SPI BIOS chip connect, and where the fan, USB and front-panel headers route. It is a practical reference for no-power, no-POST and short-circuit faults, and opens in any common PDF reader.
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 @afsschematicfree. 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.