Lenovo motherboard documentation for board NM-A151, revision 1.0, project code AILEI, packed as a 4.58 MB ZIP. NM-prefixed codes follow the numbering used by LCFC, the Lenovo-owned manufacturer behind many ThinkPad and IdeaPad boards. The archive probably contains a schematic and possibly a boardview. These help trace voltage rails, check power-good signals and pinpoint shorted components. The specific laptop model is not given, so identify the board by the NM code and revision printed on the PCB before relying on the files.
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.