Schematic PDF for the MSI MS-16U71 laptop mainboard, with 0A in the name most likely marking the document revision. The 3.49 MB file opens in any PDF reader. MS-16U7 boards are used in the MSI GL65 Leopard family. Technicians use the circuit diagrams to follow power sequencing, find which regulator drives a missing rail, check expected voltages and identify components around the EC and charger. Pair it with a boardview to locate parts physically, and make sure your board revision matches.
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.