On 28 Oct 2005 09:42:27 -0700, Bob wrote:
Hi, it is a Vertical line and yes it does drift slowly across the screen.

Are you using RF on a VHF channel between devices? Like out of the SAT
receiver, or your DVD player? In the "old" days, a moving vertical line would
unambiguously indicate co-channel interference, like a broadcast signal
leaking into an RF distribution system.

If you're running baseband video around, look for a source of 15kHz noise that
could be getting into the video. You may have a bad video cable. Since its
moving, it is not due to a problem in the video display itself (a non-moving,
ragged vertical line could indicate arcing in some portion of the horizontal
deflection circuit of a CRT-based display). Do you have more than one video
display? It could be noise from one getting into the other, but in this case
the vertical line would move *very* slowly, if at all, especially if both
displays are displaying the same video.

If you are using exclusively digital connections (DVI, HDMI), then this noise
may actually be originating in the DVD player or SAT receiver, or perhaps on
the inputs to the SAT receiver. Some SAT receiver systems use 18kHz or 22kHz
signalling to switch LNB polarity, but if your interference is related to
that, it would not be a slowly moving vertical line.

--
Art Greenberg
artg AT eclipse (remove this) DOT net