Boardview in CAD format for the Wistron project Hellcat, board number 19827-1, with TGL in the name indicating an Intel Tiger Lake platform. The 7.81 MB .cad file can be opened with FlexBV or other viewers supporting this layout format. Technicians use it to locate components, follow nets and find test pads when tracing missing power rails or a short around the CPU and VRM area. Confirm the 19827-1 number silkscreened on the PCB before relying on part locations.
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 @boardviewschematicsfree. 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.