Schematic in PDF form for the Lenovo motherboard NM-D461 at revision 0.1, an early design revision from LCFC, Lenovo's own ODM. Early revisions can differ from production boards in component values or placement, so compare carefully against the revision printed on your PCB and against the 1.0 documents if available. The diagram is used for following power rails, checking voltage regulator circuits, locating fuses and test points and isolating shorts. Any PDF reader opens it, and searching net names speeds up tracing.
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 .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.