A schematic in PDF form for the LCFC NM-C631 board, revision 1.0, with the GL4A0 and GL5A0 codes, packed in a 3.25 MB RAR. Extract it and open it in any PDF reader to follow power sequencing, regulator circuits, the embedded controller, memory and connectors. Technicians use these pages to measure missing rails, read component values and identify enable and power-good signals. The NM- number is the LCFC pattern used on Lenovo boards; match the board number and revision on the PCB before relying on the values.
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 .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.