Lenovo G430 circuit diagram for the Compal LA-4211P motherboard, supplied as a 1.18 MB PDF. The LA-number follows Compal's board numbering and can be found printed on the PCB, which lets you confirm the board before use. Schematics like this are used to trace rails from the DC jack through the charger and regulators, check enable signals during power-up, follow lines to connectors and find shorted capacitors or ICs. The revision is not in the name, so check it inside the document and compare it with the board.
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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The standard format for schematics, block diagrams, power-sequence charts and service manuals.