Schematic of the Compal LA-4141P motherboard used in the Lenovo IdeaPad Y430. Compal prints its LA-xxxxP model numbers on the PCB silkscreen, so the match is easy to confirm before you start measuring. The document covers power rails, charger circuitry, the embedded controller and display interfaces, and is handy for tracing a missing voltage or isolating a shorted capacitor. Any PDF reader opens it, and searching by net name speeds up finding signals such as power-good lines. Note any revision on the board itself, since none is stated here.
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.