An archive of repair files for Dell hardware (board DAORO8MB6E2). Shared as “Dell 14R 7420 DAORO8MB6E2 REV E2.rar” — a .rar file, 3.79 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 @IT_SERVICE_WORLD. 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)