Compal boardview for board LA5891, packed in a 424 KB RAR. No laptop brand or model is named, so match the board by the LA-5891 marking printed on the PCB. Compal assigns LA-series numbers to notebook mainboards and daughterboards it builds for various brands. In a viewer such as OpenBoardView or FlexBV, the layout lets you locate components by designator, follow nets between parts and find test points for rail measurements. Check the board revision before relying on it, as revisions can differ.
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 @LaptopsBoardview. 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.