Boardview in .cad format whose name points to board LA-F551P revision 1.0, with a 0221 suffix that probably marks a date or build; the brand and laptop model are not given. The LA-xxxxP pattern is Compal numbering, used for many HP, Dell, Lenovo and Acer machines. A .cad boardview opens in viewers such as OpenBoardView, FlexBV or Boardviewer, where you can search parts, follow nets and locate test points while hunting a short. Confirm that the number and revision silkscreened on the PCB match before trusting 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 @laptopchiplevelexpert. 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.