Small 879 KB RAR archive named IPISB-NK, with no brand, model, revision or file type given. The code resembles OEM desktop board project naming, though the specific system cannot be confirmed from the name. Extract the contents to see whether it holds a schematic, boardview or firmware. Match the code with markings on the PCB before use, and if it contains a BIOS image, save the original chip first and check that the image size matches the flash.
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 @cyberlanelectonik. 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)