Schematic PDF for a Lenovo laptop motherboard numbered NM-A101, packed in a 1.53 MB RAR archive. The NM-xxxx pattern belongs to LCFC, Lenovo's own design and manufacturing arm. The name gives no model or revision, so confirm the board code on the PCB. Use the diagrams to follow power rails, the charger circuit, power sequencing and signal paths, and to identify reference designators when checking for a short or a missing voltage on the board.
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 @schematicslaptop. 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.
7-ZipWinRARThe Unarchiver (macOS)