Archive of about 890 KB labelled only HP 520, which refers to the HP 520 business notebook. No motherboard number, ODM, revision or content type appears in the name, so the archive has to be opened to learn whether it holds a schematic, boardview or firmware. Read the board number from the PCB silkscreen and match it to the documents inside before tracing power rails or replacing parts, since a mismatched revision can send you to the wrong component.
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.
7-ZipWinRARThe Unarchiver (macOS)