An archive of repair files for Lenovo hardware (board NM-C771). Shared as “ThinkPad E14 E15 Gen 2 nm-c771 R1AET40W.rar” — a .rar file, 5.32 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)