Circuit schematic for the MSI MS-7388 motherboard, revision 1.0 according to the name, provided as a 694 KB PDF. MSI uses its MS-xxxx numbering on its own boards and prints it on the PCB, which makes identification straightforward. The drawings are useful for diagnosing dead boards: follow the standby and main power rails, verify the power-on sequence signals, find MOSFETs feeding the CPU core and confirm component values. Open it in any PDF viewer and verify the revision on the board matches before relying on part references.
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.