So we've recently started watching missed TV programs via the internet. From my laptop, I'm running an audio cable from the headphone jack to my pre-pro and an S-video cable to a video input on the TV. I'm getting a fairly loud hum in the HT system that comes and goes when I plug in or unplug the video cable. With the video cable plugged in and the pre-pro on, plugging in or unplugging the audio cable has no effect on the hum.
Any recommendations?

Scott

My HT