An archive of repair files (board LA-B015P). Shared as “b577a_Compal_LA-B015P_r1.0_2014.rar” — a .rar file, 1.58 MB.
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 @generalschematics. 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)