Schematic in PDF for Quanta board DA0AT1MB8F1, about 1.27 MB. The number follows the Quanta pattern, where DA0 plus the project code identifies the board, MB marks the mainboard and the trailing characters give the revision, here F1. The name does not state which laptop brand or model uses this board, so cross-check the code on the PCB. The diagrams serve for tracing power rails, checking sequencing and locating components around a short, and any PDF reader opens the file.
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 @biosschematics. 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.