ASUS archive for a board or model coded B34Y, RAR of about 1.80 MB, with no revision or content type in the name. It may contain a schematic, a boardview or firmware, so examine the files after extracting. Before relying on it for tracing rails, locating parts or reprogramming, compare the B34Y marking and revision on the PCB, since ASUS boards of one model can have several revisions. Back up any flash chip before writing.
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)