Layout reference for the Dell Inspiron 3158, Wistron-pattern board 14296-1, named as a boardview but stored as a 241 KB PDF. Because it is a PDF rather than a native boardview format, it opens in any document reader, though it lacks the clickable net tracing of dedicated viewer software. Technicians use it to find where a part from the schematic sits on the board and to reach test points quickly. A second, similarly named copy exists, and the -1 suffix on the PCB should match before you rely on it.
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 @hrtechno. 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.