A schematic diagram for Dell hardware (board LA-G717P). Shared as “DELL 7490 FDI50 LA-G717P PDF.pdf” — a .pdf file, 3.53 MB.
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 @pkbiosbdv. 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.