PDF schematic labelled only as Lenovo F41, about 1.18 MB. No board number or revision appears in the name, so check the title block inside the document and compare it with the number printed on the motherboard before use. Laptop schematics like this are opened in any PDF reader and used to follow power rails from the DC jack and charger through to the CPU supplies, identify components by reference designator and work out why a board is not powering on. Searching net names in the PDF is the quickest way to trace a signal.
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 @cyberlanelectonik. 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.