I've had a monitor that wiggled when it was too close to an AC adapter
plugged into a nearby socket.

Hope you solve the problem.
John




>Thank you for your replies on this. I seemed to have fixed it somewhat by
>going into the monitor settings and
>changing the Display> Settings> Advanced settings to Adapter Default,
>instead of Optimal.  It helped immensley, but there is still a slight
>quiver in the screen. I hadn't thought about interference from other
>devices.  Anyhow,
>I have my computer set up in the corner of the living room, not in the
>basement and there are no main power lines near here except the ones that
>come into the house.  It could be that the power lines are coming in this
>corner underground.  Would that be enough to effect the monitor?  I have
a
>the Monitor, computer, wacom tablet and scanner, and telephone line
plugged
>into the Internet UPS  power backup system (  Frank and Gails discussion
on
>the importance of them influenced me to get one) I will try to unplug
some
>of these and use another outlet. Anyhow, I have no radio, tv or anything
>else near here but will be sure not to do this in the future.  Thanks
again.
>Dorothia