PDF of 27.9 KB filed as a schematic under the code 3LN01S, which reads as a discrete component part number with an S suffix. The name gives no laptop, brand or board information. Expect a brief sheet with pin functions, absolute maximum ratings and a drawing of the package. Technicians open such files in any PDF viewer to identify small parts on a board, locate their terminals for testing and compare alternatives when the original is unavailable. Confirm the exact variant against the package marking 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.