Component PDF for the 1SS391, 69.0 KB, stored with the schematics. The filename carries only the part number and an underscore, so there is no laptop model, board revision or brand to note. The 1SS prefix follows the Japanese small-signal diode designation, which points to a datasheet with ratings and package details. Technicians check such documents when a diode near a power input or data line tests faulty and they need to confirm polarity, marking and an equivalent part. Match the package to the board pads first.
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.