Schematic PDF named only N69, which gives no brand, board number or revision. The file is 1.69 MB, so open it and check the title block and page headers to identify the device it documents. Once matched, a schematic like this is used to trace voltage rails, follow enable and power-good signals, check connector pinouts and find the components on a shorted line. Confirm that the number printed on the PCB matches the document before relying on any component value or reference designator.
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 @ITHINKHS. 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.