If you are encountering any kind of visible distortion on your computer monitor, there are a couple of things that I would suggest.
First, if you have a cathode ray tube (CRT) monitor, you may want to try manually degaussing the monitor. Whenever a CRT monitor is in use, it slowly builds up a magnetic charge that can interfere with its operation. Degaussing then, is the process by which CRT devices rid themselves of this excess magnetic charge. This is normally done whenever a monitor is first turned on, but many monitors will also have either a button on the front control panel you can press or an option in the main menu to perform a manual degauss.
In many cases, the degauss option will be marked with a horseshoe or magnet-shaped picture. Once you've selected this function, you may notice a metallic-sounding "twang" noise, followed by one or two "clicking" noises as the image on the screen is reset. Keep in mind that images on the screen may appear to vibrate and color may distort for a few seconds after you do so, but this is a normal part of the degaussing process. The screen should return to normal after a few seconds.
Second, interference can also be caused by placing your computer speakers too close to the monitor. Many speakers will produce a magnetic field of their own, which only adds to the magnetic field generated by your monitor. In this case, repositioning your computer speakers should help minimize the problem.
If degaussing fails (or you don't have a CRT monitor), you may wish to then test the cable connections to your computer. In some instances, simply replacing your monitor cable will resolve these types of problems.
You may also be encountering a problem where your monitor is simply set on the incorrect refresh rate. If the refresh rate is not correctly set, a monitor may display a "wavy" image or appear as if lines are periodically scrolling across the screen. Without knowing the exact make and model of your monitor however, I would not be able to provide any suggestions on how to change this setting - you would need to contact the manufacturer or refer to your owner's manual for specific instructions.
The worst case scenario would be if you are encountering an actual hardware failure. Both the video card and monitor can cause images to be distorted if they are not functioning properly, and even power supplies have been known to cause other components to sporadically malfunction. If you are unsure how to perform a hardware diagnostic, I would strongly suggest speaking with your local computer repair technician or a Geek Squad® agent at your local Best Buy™ store for further assistance.
Hope this helps you out.
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Jun 06, 2008 |