Schematic for the HP Compaq 6515b business laptop in a 1.03 MB PDF; the name does not give a board number or revision. A schematic helps trace power rails, follow signals, find faulty components and check where a short sits on the board. It opens in any PDF reader. Before relying on it, compare the board number printed on the PCB with the one on the drawing pages, because the same model may use more than one mainboard version.
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.
Any PDF readerSumatraPDFFirefox / ChromeFlexBV (links PDF to boardview)