Schematic diagram for the ASUS K53SV laptop in PDF format, 593 KB. The name gives no board number or revision, so compare the title block inside the document with the silkscreen on your mainboard before relying on it. Repair technicians use such drawings to follow the power sequence, find which regulator feeds a dead rail, locate test points, and trace signals from the chipset to the ports. Any PDF reader works, and searching for net names inside the document speeds up diagnosis of shorts and missing voltages.
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.