Yep. That's why I was asking how long it takes the line to cross from one side to the other and if this is a new problem. DVI and HDMI aren't immune to "noise" either and if anything, they may actually be more susceptible. Optics is the only immunity to noise. A Faraday shield won't help if the noise is low frequency like 60Hz.

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated