PDF schematic for the Lenovo motherboard NM-A931, an LCFC board number, with no model or revision stated in the file name. The schematic shows power rails, sequencing, charger, EC and interface circuits, and helps when tracing signals, checking resistor or capacitor values and diagnosing a no-power or short fault. LCFC, the Lenovo and Compal joint venture, uses NM-prefixed numbers. Check the revision in the title block against the board you have.
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 @cidschematicandboardviewofficial. Enginerys does not host this file.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.