RAR archive of 3.05 MB with a boardview for the Compal LA-J272P mainboard, with FDV42 listed as the platform or project code. No revision is stated, so compare the silkscreen on your board with the file before relying on it. Technicians use such a layout to find a component by reference designator, see which nets connect to a connector pin and pick convenient test points for rail measurements. The LA prefix marks Compal ODM designs, which are shipped under various laptop brands. Viewers like OpenBoardView or FlexBV handle the usual formats.
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 @BoardSchematic. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.