A 121 KB PDF indexed as a schematic, named 300HFU-100. Apart from that code and its dash suffix, there is no brand, laptop model or board revision. The suffix probably denotes a rating variant within a component series. A technician would use the sheet to confirm pin assignment and limits when testing or swapping the part. It opens in any PDF reader. Make sure the marking on the actual component, including the dash number, matches before substituting.
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.
Any PDF readerSumatraPDFFirefox / ChromeFlexBV (links PDF to boardview)