PDF schematic for the Lenovo F41 laptop, 1.18 MB in size. The name gives no motherboard number or revision, so the title block inside the document should be checked to find which board it covers. A schematic like this, opened in any PDF viewer, lets a technician follow the power-on sequence, measure the voltage regulator outputs and find the components connected to a shorted rail. Compare the board number printed on your PCB with the one in the drawing before relying on component references.
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 @alischematics. 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.