EMI messing with monitor... ?

[tgillitzr]

In the corner where my desk sits, it appears there is some major EMI or something. My monitor, at any refresh rate other than 60Hz is super jittery. If I move the monitor into a different room it works fine. I've tried different video cards. I have another monitor that I put in its place thinking it was the monitor going bad. It did the same thing.

Any ideas on how to fix this? If need be, I guess I can move my desk to the other room, but that would be a MAJOR PITA.

 

[bwass24]

Do you have any of the following near the monitor:

-an AC fan or any other AC motor (most probable)
-non magnetically shielded speakers
-a magnet or heavy iron object (like the base from a lamp, etc.)
-an electric lock or relay/solenoid
-a TV
-something that contains an old, large linear power supply

 

[tgillitzr]

a ceiling fan, obviously on the ceiling...

thats about it
there is a router on one side of it, and my cable modem on the other side...

 

[SXMP]

also, even if the unshielded electronic device is far from the monitor, it can still cause interference by being plugged into the same power strip or outlet...

 

[tgillitzr]

I will try plugging it into a different outlet/circuit.

Any other ideas? Is there anything I can purchase that will fix it?