Schematic diagram in PDF for the LCFC motherboard NM-D961, a Lenovo in-house design. LCFC uses NM-prefixed numbers for its boards, so the code on the PCB is the reliable identifier when model names vary. Schematics give the power sequence, rail names, voltage regulators and signal paths, which are needed to diagnose no-power, no-display or charging faults. Any PDF reader will open it after extraction. Pair it with a boardview to find each part physically, and match the board revision first.
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.