A schematic diagram for MSI hardware (board MS-16Q2, MS-16Q21). Shared as “MS-16Q2 MS-16Q21_REV1.0 Schematic.pdf” — a .pdf file, 4.48 MB.
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 @pkbiosbdv. 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.