An archive of repair files for Sony hardware (board MBX-226). Shared as “4a41b_ mbx-226 _foxconn_m9a0_mp_sony_vaio_vpc_cw.rar” — a .rar file, 903 KB.
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)