An archive of repair files for Lenovo hardware (board LA-L161P). Shared as “IdeaPad Gaming 3-15IHU6 H4CN29WW.rar” — a .rar file, 12.4 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.