An archive of repair files (board 19746-1). Shared as “MOCKINGBIRD-L CML UMA 6L (19746-1 YJCJD).rar” — a .rar file, 17.5 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 @Satale_bios_esquemas_Laptop. 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)