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My Monitor Screen Keeps Moving Up & Down What Would Cause That!


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highbids's Avatar
highbids highbids is offline
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01-Feb-2010, 10:13 PM #1
My Monitor Screen Keeps Moving Up & Down What Would Cause That!
I've been having issues with my monitor screen moving up & down at a
high rate & I'm thinking it's a bad driver or would a virus do it.

Is there a software program that can diagnose the problem
here's my computer & video specs.

Computer: Dell DImension 8300 2.8 Mhz
NVIDIA: GeForce4 MX 440 with AGP8X
Monitor: COMPAQ 7500
DivX Plus Directshow Filters
DivX Plus Web Player
Java 6
Alex Ethridge's Avatar
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Location: Birmingham, Alabama USA
Experience: 15 years of just doing it
02-Feb-2010, 03:58 AM #2
LCD or CRT?
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DreadStorm DreadStorm is offline
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02-Feb-2010, 06:06 AM #3
Compaq 7500 is a 17" CRT.
My starting suggestions would be...
1) Check for loose connections - at both ends. wiggle the cable and see if the picture stabilizes.
2) Go to Radio Shack or similar, and obtain a can of TV Tuner/Cleaner/Lubricant spray, and dose the monitor control knobs (if it has any) with it. If no knobs, skip this.
3) Plug the monitor into another system, see if it still does it.
3A) If yes, monitor's likely going out.
3B) If no, start looking at your video card. Picture jumping on a CRT isn't a software issue, it's signal and/or hardware related.
Alex Ethridge's Avatar
Member with 8,477 posts.
 
Join Date: Apr 2000
Location: Birmingham, Alabama USA
Experience: 15 years of just doing it
02-Feb-2010, 06:18 AM #4
CRTs are subject to EMI (electromotive interference) because of the powerful magnets around the tube. Any kind of fan, electric motor, electric heater near them or on the same circuit can cause wiggling or waving of the picture, even something on the other side of an adjacent wall.

Move the monitor as far as the cord will allow and see if there is a change. If not, take it to another computer. That will at least tell you if the trouble originates in the monitor or in the computer.
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