RAR archive for Lenovo board NM-E141, classed as a boardview, although PDF in the name suggests a schematic is bundled as well. NM-prefixed numbers follow the LCFC scheme used for Lenovo-built laptops, and no model name is given. Use the layout to locate components and test points, and any included PDF to trace power rails and signal paths. Open the board file with FlexBV, OpenBoardView or similar, and the PDF in any reader. Check the board number and revision on the PCB before relying on 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 @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.