Schematic PDF for a Dell laptop motherboard with Compal board number LA-D822P; the name does not give the model. Compal marks its boards with LA-xxxxP codes, printed on the PCB near the edge or under the memory slots. The 1.52 MB document shows power circuits, signal routing and connector pinouts, used for tracing rails and locating a shorted part. Confirm the LA number and revision on your board match before working from 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 @datasheets1. 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.
Any PDF readerSumatraPDFFirefox / ChromeFlexBV (links PDF to boardview)