A schematic diagram for MSI hardware (board MS-16Q41). Shared as “MS-16Q41 Schematic.pdf” — a .pdf file, 6.94 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 @notebookschematic. 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.