An archive of repair files for HP hardware (board DAONM9MB6DO). Shared as “HP DM1 DM1-4175nr QUANTA DAONM9MB6DO.rar” — a .rar file, 938 KB.
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 @generalschematics. 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)