An archive of repair files for HP hardware (board DAR33HMB6A0). Shared as “Hp RT3290 R33H DAR33HMB6A0 REV-A.rar” — a .rar file, 3.42 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 @nityatechnology2020. 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)