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I don't think degaussing your monitor is going to help with this issue. Degaussing mainly addresses color correction around the monitor edges due to a magnetic field and applies to CRT monitors not LCD monitors which yours is. If by your term "shaky" you mean the image is unstable, then the problem is either in the main board which controls the X Y sync or with the power supply board. If you are knowledgeable with electronics you could probably repair this at home for $40 or less. If not then I would shop for another monitor to replace yours. Don't throw your old monitor away, instead post it for sale on craigslist. There are a lot of do it yourself type people who will buy this either for parts or to repair and resell. I don't know what it will bring as far as cash, might be $40 might be $5 but anything is better than zero.
The CRT has likely become magnetized. On the monitor's main menu there is a "degauss" option. It is the option depicting a horseshoe magnet. Select that option to degauss the CRT, and the color distortion should clear up. If it improves but does not clear up entirely, degauss the CRT again. Is the monitor situated near a magnet (such as a speaker, a subwoofer, or some other source of magnetic field)? If so, either move the monitor away from the magnetic field source or move the magnetic field source away from the monitor, then degauss the CRT by selecting that option from the main menu on the monitor. Was the monitor dropped? If so, a series of electromagnets at the back of the CRT (called the "blue lateral") may have come loose. This is somewhat challenging to align and is best handled by a technician.
To fix this, you need to do something called degaussing. You should keep magnets away from the screen in the future, because they cause this problem.
The first thing to try is to turn it on and off, making sure that all magnets and speakers (which have magnets in them) are kept far away from it. This will activate the monitor's auto-degausser if it has one.
If this does not help, this guide: http://www.wikihow.com/Degauss-a-Computer-Monitor gives a couple solutions, including using a soldering gun (not a soldering iron), illustrated in the video below:
With a powerdrill:
Or investing about 60 bucks in a degaussing coil like this which is a guaranteed fix:
One other trick that might work is to take an old CRT monitor ("fat-screen" rather than "flat-screen"), hold it up to the tv screen to screen, and turn it on and off to have the monitor use its own degausser. The monitor may have a button to activate degaussing, or it may be in the menu you can bring up with the buttons on the bottom of the screen.
If you don't want to deal with any of this, a tv repair shop will degauss your tv for you quickly.
You can try to degauss it, not sure if that's the problem. May be something that cannot be fixed. Bring up the on-screen menu, locate the degauss option , and select it. You should now hear the degaussing noise, and the screen will probably display a brief burst of color.
I went to the panel buttons, and then punched the reset for each of the icons on the menu. That restored the display picture to its factory settings. The degaussing did not help the picture, and any stray magnetism is generally automatically degaussed when the computer starts up. As to the flickering of the picture, that is because of the refresh rate. I am using a relatively updated operating system, and the refresh rate has changed somewhat. I also believe the temperature of the computer affects the flickering. I hope this comment helps someone who has a similar problem.
Yeah, Degaussing is basically resetting the magnetic field inside the monitor. go into the menu options, and search for that option. if this does not work, then your monitor is really old, and needs replacing.
A hand held soldering iron with a trigger will degauss a monitor. Don't actually touch the iron to the monitor. Just run it around the edges while holding the trigger. A little trick I picked up while working on radar sets.
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