Dell 14-series laptop schematic for Compal board LA-B843P, revision 1.0, PDF format. The exact model is not given beyond the 14 designation, so identify the machine by matching LA-B843P printed on the PCB. The LA-xxxxP numbering is Compal's. Technicians use this drawing to follow power rails and the startup sequence, check embedded controller signals and find components around shorted lines. It opens in any PDF reader.
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 @afsschematicfree. 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.