Boardview for a board labelled H46Y, supplied as a 358 KB RAR archive. The name gives no brand, model or file format, so check the extension inside to choose a viewer such as FlexBV or OpenBoardView. A boardview shows where parts, pins and nets are located, which speeds up finding test points, tracing shorts and identifying missing components. Use it alongside the H46Y schematic, and confirm that the board marking matches before relying on part 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 @schematicslaptop. 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)