PDF drawing tied to board 15250-1, labelled as the top side, about 191 KB. The five-digit-dash-digit numbering follows the Wistron scheme, so the board was made by that ODM, though the name does not state the laptop brand or model. A top-side sheet like this normally shows component placement, helping you find parts, test points and connectors referenced in the matching schematic. It works alongside the bottom-side file for the same board. Confirm that 15250-1 and its revision are printed on your PCB before relying on 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 @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.