RAR archive identified only by the Compal board number LA-C811P, with no model, revision or file list given in the name. Its 6.21 MB size could hold a schematic, a boardview or firmware, so open it and check what is inside before planning a repair. LA-xxxxP is the usual Compal motherboard code, and Compal builds boards for several laptop brands. Whatever the contents turn out to be, confirm the number printed on your PCB matches LA-C811P 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 @ITHINKHS. 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.
7-ZipWinRARThe Unarchiver (macOS)