Schematic PDF for a laptop mainboard numbered LA-D102P, 1.47 MB; the name gives no brand, model or revision. LA-xxxxP is Compal's numbering scheme, used for boards made for Dell, Lenovo, HP, Acer and others, so identify the system by matching the number on the PCB. The schematic shows power rails, voltage regulators, the embedded controller, and signal paths, useful for diagnosing no-power faults and shorts. Open it in any PDF reader and search net names to jump between pages.
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 @cynetitsolution. 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.