PDF circuit diagram for the MS-7395 motherboard, version 1.0, roughly 1.15 MB. The MS-7xxx number matches the scheme MSI uses for its desktop mainboards, though the name carries no other model details. Any PDF reader opens it. Typical uses include following voltage rails from the power connector through each regulator, checking power-good and reset signals, and locating parts behind a short to ground. Verify that the version silkscreened on the PCB is 1.0, since later revisions may change component placement.
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.