Z84J service archive in RAR format, 2.45 MB. The name states only the model or board designation and gives no revision or content details. The larger size suggests more than a bare firmware image, possibly a schematic set, but you can only confirm this after extracting it with 7-Zip or WinRAR. Use schematic pages to measure rails and trace a short to its source. Check that the board marking on the motherboard matches before you replace components according to these documents.
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.