Small 521 KB PDF schematic labelled Foxconn M9F1 and catalogued under ECS, with no laptop model, board revision or chipset named in the file name. Since the name gives so little, compare the board number and revision on your PCB with the title blocks on the drawing pages before using it. Once matched, the circuit diagram serves for tracing power rails, finding regulator enable and power-good signals, checking test points and identifying the components connected to a shorted net. Any PDF viewer opens it.
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 @schematicslaptop. Enginerys does not host this file.
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How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.