I recently purchased a d3100 dock and I'm using it to connect my Inspiron 13z with Windows 8.1 to several peripherals, including an HDMI monitor and stereo speakers. It turns out that my monitor has internal speakers and does not allow them to be disabled or muted. They sound terrible, so I'd like to stop sending audio to them. Unfortunately, windows sees the Dell dock as a single USB audio device and I don't have the ability to send audio to the 3.5 mm stereo output without also sending it to both of the HDMI outputs.
If anyone has a suggestion on how to use the HDMI output for video without sending audio to my monitor's speakers, please let me know. Are there any HDMI cables that do not have an audio connection?