ZIP archive of about 2.19 MB for Lenovo motherboard NM-A272, revision 1.0, with project codes ACLI1 and ACLU2. The board code follows the LCFC scheme used for Lenovo-designed notebook boards. It is a close relative of NM-A271, so verify which number is printed on your PCB. The contents most likely include a schematic, possibly paired with a boardview, for tracing rails, locating components and diagnosing no-power faults. The specific laptop model is not given in the name.
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 @ITHINKHS. 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