RAR archive, 3.31 MB, for Compal board LA-D071P; neither the laptop brand nor the archive contents are named. The LA-xxxxP pattern is Compal's board numbering, used on notebooks it builds for many brands. After extraction, check whether the package holds a schematic, boardview or both, which together let you trace power rails, find components on the PCB and probe test points. Make sure the number and revision printed on the motherboard match LA-D071P before trusting values or pinouts.
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 @cyberlanelectonik. 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.