Mainboard schematic for the Microsoft Surface Studio 1 all-in-one, labelled NHK_MB, about 2.45 MB in PDF. Schematics for Surface devices are uncommon and useful for tracing power rails, the power-up sequence and signals between the processor, graphics and display interface. It also helps identify components around a shorted rail or failed circuit. Any PDF viewer opens it. NHK appears to be the internal project label, so compare markings on your board with the title block and check the revision before using component values.
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 @afsschematicfree. 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.