Lenovo motherboard boardview for LCFC board NM-E141, revision 1.0, in a RAR archive of 1.04 MB. LCFC is Lenovo's own manufacturing arm, and its NM-xxxx codes are printed on the PCB, so check the number and revision match. The layout shows where every component sits and which net each pin joins, which helps when tracing rails, isolating a shorted part or locating the BIOS and EC chips. No specific Lenovo model is named. Open the extracted file in FlexBV, OpenBoardView or similar software.
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.