Volume 21 from a split RAR archive titled GTA V - ATOM GUY EDITION, roughly 3.9 GB, which judging by the name holds a repackaged game, not electronics repair material. No board number, device or firmware is linked to it. Multi-part RAR sets extract only when every volume is present and undamaged in one folder, starting from the first part with WinRAR or 7-Zip. On its own, this piece cannot be opened. It offers nothing for diagnosing or reflashing hardware and is listed here only as a stray archive in the index.
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 @laptopschematics. 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.