Laptop schematic for the MSI MS-16J91 mainboard, a PDF compressed into a 1.46 MB RAR file. The MS-16xxx pattern is MSI's notebook board code, so match it with the sticker or silkscreen on the motherboard rather than the retail model name. Revision is not given, so confirm it on the diagram's title block. Use the document to follow adapter input, battery charging, always-on rails and the sequence the embedded controller drives at power button press, and to find expected voltages at test points.
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 @cyberlanelectonik. 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.