A schematic diagram for HP hardware (board 6050A2314301). Shared as “HP 6050A2314301-MB-A04 0326 PDF.rar” — a .rar file, 1.82 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 @alischematics. 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)