PDF schematic for the K42F laptop, roughly 1.4 MB in size. The file name does not state a board number or revision, so check the drawing's title block against the marking on the motherboard before relying on component values. These circuit diagrams are the basis for diagnosing no-power and no-display faults: following rails from the adapter input, verifying enable and power-good signals, and pinpointing which part sits on a shorted net. Open it in any PDF viewer and use text search to jump to specific nets.
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.