Indexed as a schematic, this 54.4 KB PDF is named 50HQ, a short series-style code with no laptop model or board number. It probably holds a family datasheet for a discrete power component, similar in size to the 51HQ document. Expect package outlines, pin identification and maximum voltage and current for several grades. It helps when checking a failed part or finding a substitute. Because the sheet may list multiple variants, read the full marking on your component to select the correct specification.
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 @cyberlanelectonik. 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.