Service package for the ECS 915GV-M5 at revision 1.0, a 1.25 MB RAR file. The board name suggests an Intel 915GV chipset, while the contents are not described and should be checked after extraction with WinRAR or 7-Zip. Since a revision 1.1 archive for this model is also available, verify the silkscreen before choosing which to follow. A schematic matching your PCB helps in tracing the standby and main rails, measuring the CPU core supply and locating components when diagnosing a dead board.
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.