LCD Interference

[cw4u]

I'm using a LCD monitor with a ETC Express at a community theater, and I appear to be getting some sort of interference. Maybe EMI? I've got dimmers to the right of it, audio to the left of it, and wires running everywhere. The screen seems to just jerk every now and then. I set the phase on the LCD so that its better.

It's not so much of a problem, just wondering if anybody had a clue as to why it was doing this?

[daver2]

There is the usual chestnut of a loose connection. Failing that, it could be interference down the mains. Try and see if the occasional jerking is related to anything else nearby (e.g. an electrical heater). Try the screen elsewhere (home computer for example) and see if the physical screen itself is failing or is working OK in a different environment.

[tedanderson]

The problem is probably with the ETC or the monitor itself.

IMPO an LCD wouldn't be affected from EMI because it is made up of liquid crystals that are electrically charged in order to produce an image. Because this type of technology is made up of tiny dots that are directly charged and discharged on a sheet of glass that is about as thick as a piece of thin cardboard, a magnetic field cannot effect it.

[cw4u]

I brought the board and LCD back for a small event this sunday, and it works fine at the church.

Any idea?

[cmchamp]

"Wires running everywhere" is what I suspect interfering with the VGA cable.

[cw4u]

That's what I was thinking.

When I get the chance, I'll clean those wires up and let you know how it goes.