Schematic PDF from MSI for boards MS-17E51 and MS-16U51, version 1.0, about 3.6 MB. MSI uses the MS-xxxxx pattern for its own motherboard numbers, and one document often covers related 17-inch and 16-inch designs. The diagrams help trace power rails, VRM stages, charger and EC signals when diagnosing a dead, shorted or non-booting laptop board. Check that the MS number and version printed on your PCB match before relying on values, since the two boards may differ in places.
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 @cynetitsolution. 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.