Boardview file identified only by the code BY27 with revision 104, in WPH format and 514 KB in size. The name gives no brand or laptop model, so match it against the board marking on the PCB before use. WPH files are opened with boardview software such as BoardViewer, letting a technician find components, nets and test points, follow power rails and locate where a short sits. Check that the revision printed on the board is the same, because component placement can change between revisions.
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 @bios_laptop. Enginerys does not host this file.