Connecting The White Dvi Cable; Connecting The Blue Vga Cable - Dell S2740L User Manual

NOTE: Do not connect all cables to the computer at the same time.
2. Connect either the DVI, the HDMI, or the VGA display connector cable to the corresponding video port on the back of your computer. Do not connect all cables
on the same computer. Use all cables only when they are connected to different computers with appropriate video systems.

Connecting the white DVI cable

Connecting the blue VGA cable