RAR archive of 4.27 MB for model GH73G on board LA-L181P. LA-xxxxP numbers follow the Compal scheme, so Compal designed and built this motherboard. The name does not state whether the archive holds BIOS, EC firmware or documentation, so extract it and check the contents. If it contains a flash image, use an SPI programmer, back up the existing chip first, and make sure the board number on the PCB and the chip capacity match before writing.
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 @boardviewschematicsfree. 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)