Boardview for the Compal LA-M401P motherboard, packed in a RAR archive of 3.65 MB. The LA-xxxxP code is Compal's standard numbering for laptop mainboards it builds for brands such as Dell, Lenovo, HP and Acer, and the name does not say which laptop this one belongs to. Inside you can expect a layout file that a boardview viewer such as OpenBoardView, FlexBV or BoardViewer opens. It lets you locate components, find test points and follow nets while chasing a short or a missing rail. Check that the LA number silkscreened on the PCB matches before relying on 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 @hrtechno. 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.