Boardview for the Dell Inspiron 3555 with AMD platform, board labelled Iris, Wistron number 15276-1, Dell part Y25DC, in .cad format. Wistron typically identifies Dell boards with a five-digit number and dash suffix plus a project name, here Iris. The layout helps a technician locate parts, follow nets and find test points when chasing a short or missing rail. Open it in OpenBoardView or FlexBV, and confirm 15276-1 and the Dell part number on the PCB before relying 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 @boardviews. Enginerys does not host this file.
How to open a .cad file
GenCAD text export, the usual format for Compal, Quanta, Wistron and Dell / HP / Lenovo laptop boards.