A schematic diagram for Lenovo hardware. Shared as “THINKPAD E40 QUANTA_GC5B_AMD_DIS PDF .rar” — a .rar file, 1012 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 @generalbios. 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)