Schematic in PDF form for a board identified as Z94RP, revision 1.2. The name gives no laptop brand or model, so the device has to be confirmed from the PCB itself. A technician uses a schematic like this to trace power rails, follow enable and power-good signals through the startup sequence, and find which components sit on a shorted line. Any PDF reader opens it, and text search for net names helps a lot. Before relying on it, make sure the board code and revision 1.2 printed on the motherboard match this 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 @CLRINDORE. 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.