Also,

the color of the waves never change --- they are always just a
white-grey color. They don't even look like a color --- just that
"noise" look if you will. Also, if I flip through each input (video1,
video 2, etc.) the exact same wave pattern is present. Also, when the
waves are not present, there is some kind faint noise in the background
-- almost looks like smoke or gas. It's kind of wispy. Very, very
faint.

Finally, the higher the brightness level is on the TV, the easier they
are to see.