An archive of repair files for Lenovo hardware (board NM-A311). Shared as “ACLU9 ACLU0 NM-A311 (REV 1.0) (2014-03-12).rar” — a .rar file, 4.96 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)