Small RAR archive of about 104 KB that, judging by its name, wraps a single JPG image, probably a scanned diagram or reference picture. The name carries no model, brand or board number, so its subject is unknown until opened. Images like this are often component location shots, connector pinouts or partial schematic pages. Extract it with 7-Zip or WinRAR and view it in any image viewer; verify that what it shows corresponds to the board being repaired before using any values or positions.
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 @generalschematics. 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.