Samsung 400UX-2 Quick Start Manual page 14

Using the DVI (Digital) connector on the video card.
• Connect the DVI Cable to the DVI port on the back of your LCD Display
and the DVI port on the computer.
Using the HDMI (digital) output on the graphics card.
• Connect the HDMI IN port on the monitor to the HDMI port on the PC
using the HDMI cable.
Note
When the HDMI cable to the PC, ensure that you select HDMI from both
the Source List and Edit Name before selecting PC or DVI device so that
normal PC screen and sound can be outputted. Note that sound is only
available when connected according to the option
Connections
that follows.