Lenovo boardview for LCFC board NM-C181, labelled with the FA391 and FA491 project names, packed into a 940 KB rar archive. FA391 and FA491 are the project names given in the file name for machines sharing this board, and NM-xxxx numbers belong to LCFC. No revision is given, so check the marking on your PCB first. A larger separate file for NM-C181 also exists for comparison. Open it in a boardview viewer to find parts, test points and power rails.
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 @BoardSchematic. 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)