ECS archive labelled A980-1-4-01, a compact 796 KB RAR file. The code follows the internal drawing numbering ECS uses on its circuit diagrams, where a model code is followed by a sheet and version string, so this is most likely a schematic set, though the name does not confirm it. Open it with WinRAR or 7-Zip and compare the model on the title block with your board. Schematics like this help trace power-on sequences, check shorted rails and identify replacement components on ECS mainboards.
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.