Schematic PDF of 672 KB whose name only gives C660, most likely a model designation, with no brand, board number or revision stated, so the exact device has to be confirmed by opening it and reading the title block. Laptop schematics typically list the ODM project code and revision on each page, which you should compare to the markings on your motherboard. Once matched, the diagrams let you follow power rails, identify components around a fault and trace signals between the chipset, CPU and connectors.
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 @schematicslaptop. 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.