Schematic for the Quanta R18D project in a 2.83 MB PDF. The name gives no laptop brand, board number or revision. Quanta motherboards usually carry a DA-prefixed code with the project name embedded, so confirm R18D appears in the number on your PCB. Repair use includes following power sequencing, checking voltages at regulators and test points, and tracing signals across pages when a board will not start. Standard PDF software opens it. Check the revision on the board, since part values can differ between revisions.
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 @hrtechno. 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.