Generic MSI laptop schematic diagram in a 1.60 MB RAR archive; the name gives no model, board number or revision, so the contents have to be opened to identify which notebook it covers. Once matched, a schematic like this lets a technician follow power rails and enable signals, locate shorted components and identify test points. Check the MS board number in the drawing title block against the one silkscreened on the PCB, since MSI used many similar designs and values may not carry over.
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 @generalschematics. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.