Quanta DM5 Shelby schematic for the integrated graphics board version, a PDF of about 1.07 MB. No revision appears in the name, so check the title block before comparing it with a board on the bench. Use it to find where each power rail starts, which components the embedded controller switches on during startup, and what sits on a net that measures shorted to ground. Any standard PDF viewer opens it. Separate discrete-GPU builds of a Quanta project differ, so verify the board variant first.
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 @abgm_manutencao_esquemas. 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.