A boardview (component placement) file for Acer hardware. Shared as “Acer Extensa 2540 B5W11 LLA-E061P.brd Boardview.rar” — a .rar file, 51.6 KB.
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 @skclappybios. 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)