Archive for the Lenovo Legion Y540 mainboard NM-C372, revision 2.0, in a 2.66 MB rar file. The contents are not listed, but packages like this usually hold a schematic, a boardview or both. NM-C372 follows the LCFC numbering used for Lenovo boards, so the same board may appear in related models. Use the material to trace power rails, find components and test points, and diagnose no-power or no-display faults. Check the revision printed on the PCB against r2.0 before trusting it.
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 @schematiclaptopramkushwaha. 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.