ZIP archive, 1.31 MB, for Lenovo LCFC board NM-A541. The laptop model and the contents are not stated, so unzip it to see whether it holds a schematic, boardview or BIOS dump. The NM- prefix marks boards designed by LCFC, the Lenovo ODM. The number is printed on the PCB silkscreen and should match before you use these files. Typical uses include tracing rails, checking power sequencing and, for dumps, reflashing the SPI chip after saving the original.
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 .zip file
Compressed archive that every operating system opens without extra software.
Built-in OS tools7-Zip