A boardview (component placement) file for Lenovo hardware (board 17821-2M, 17821-1). Shared as “L380 (type 20M5, 20M6) BIOS (ThinkPad) 17821-2m.rar” — a .rar file, 16.0 MB.
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 @Laptopbiossolutions. 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)