Power-up sequence document for a B460 notebook, a very small 18.5 KB PDF that probably contains a single diagram or page rather than a full schematic. It outlines the order in which standby and main rails and their enable signals come up, which is what a technician checks when a board will not turn on. Measure each rail and enable in sequence to find where the chain stops. No board number is given, so confirm against the full schematic for your motherboard before replacing parts.
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.