Laptop schematic in PDF form for a board identified as FA506Q, revision R2.0. The name gives no brand, so confirm the model code against the label on the PCB before working from it. A circuit diagram like this lets a technician follow power rails from the charger input through the regulators, trace signal paths between chips, and identify the parts around a suspected short. Any PDF reader opens it, and text search for net names or reference designators makes navigation much quicker on a multi-page document.
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.