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Proceed with this steps and fix it. God bless you Instructions
1
Turn on your Sony Trinitron television.
2
Flip the power switch on your degausser.
3
Maneuver the degausser's coil so that it is a few inches
away from the face of the screen. Draw the center of the degausser coil
around the entire perimeter of the screen, and then return the degausser
to the middle of the screen.
4
Slowly back away from the Trintron's screen. This serves to
decrease the degausser's impact on the CRT's magnetic field to zero.
Continue backing away until you are about five feet away from the screen
5
Flip the power switch on your degausser to turn it off. The
CRT's magnetic field should return to its normal state and the picture
quality of your Sony Trinitron should improve.
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Degaussing is the process of removing unwanted residual magnetism from the iron core of wire coils. The process maintains or improves the efficiency of such coils and on later crt tv and monitors the process was often done automatically on startup. It is a brief but noisy process. Degaussing was (is) also used on magnetic record/replay heads and suchlike.
CRT monitors and tv use strong electromagnets to make the spot scan into a picture. I don't know how scanning is carried out on a flat screen tv but Wikipedia remarks the flat screen display has displaced the magnetic scan systems...
If your set looks like the one pictured above it is likely magnetized and needs to be degaussed (or demagnetizing).
All CRT type TV's are prone to becoming magnetized, slowly by the magnetic pole of the earth or quickly by motors, magnets (or speakers) within close proximity of the set (5feet). Therefore, all standard CRT type TV’s have an internal demagnetizing circuit that is engaged when the set is first turned on, after being off for the day (up to12 Hrs). If this circuit is working then you’ll sometimes hear a "bonk" sound (about 1/2 a second long when the set is first turned on) this indicates that the circuit is active.
The first thing that you could try is to remove any speakers or motors nearby the TV. Next, unplug the set and (re-plug) try again the next day (8-12hrs). If the set is weakly magnetized and the degauss circuit is working (and all external nearby magnetic sources are removed) then the set should automatically degauss and resume normal operation.
If this circuit is not working then the TV set will become strongly magnetized either over time or quickly (if magnets or motors are near the TV) and the TV will have to be degaussed with a tool, commonly used at TV repair shops called a degauss coil. In order to properly demagnetize the TV the set would have to be brought in or a have service call booked. The demagnetizing can be done without removing the back cover of the TV but it’s best to have the technician check that the degauss circuit works in order to avoid the problem from reoccurring. The total cost of repair in shop should normally be less than $80.00.
In rare cases or if the set has been dropped or physically damaged the TV may exhibit the same symptoms. This is usually due to a broken or warped shadow mask (which is internal to the CRT) and is usually not economical to repair.
degauss comes to mind... when older monitors build up magnetic field it distorts thic picture and a degauss shakes/scrambbles the screen and gives a nice *thongggg* sound that eleminates the disruptive magnetic build up. (or something)
only flaw with this answer is you usually degauss on purpose.... never seen a monitor degauss on its own, and only old projection style monitors worry about this
Degaussing is not something that ever needs to be done on this device.
Degaussing is a term that I learned many years ago - it was a process performed periodically on early CRT (cathode ray tube) displays (such as a TV). Over time, CRT displays would build up magnetic charges that would cause the image to become distorted. A degaussing wand would be connected to an AC outlet and then brought very close to the display and gradually withdrawn. This would neutralize the magnetic charges on the display - and the resulting distortion. Years later, manufacturers incorporated a degaussing coil inside the display's cabinet that did the same job as the degaussing wand - thereby making the wand obsolete.
The GPSMap 172 has an LCD display that requires an electrical charge to create an image on the display. Unlike a traditional CRT type displays, an LCD (or LED for that matter) display is unaffected by magnets / magentism. Hold a magnet near a non-CRT type display to see for yourself. A magnet held near a CRT display however will distort the image more as it gets closer to the display. Caution: Doing this may cause PERMANENT damage to the CRT display. This is why many home theater speaker systems touted that fact that they were "magnetically shielded" so that they would not distort the images on the CRT display.
Every time you turn on a color TV, a degaussing circuit tries to neutralize magnetic fields on the picture tube face that can cause distorted colors. That degaussing circuit isn't strong enough to clear up the field left by direct contact with a magnet. You need an external degaussing ring to clear up the funny colors. You can see what one looks like here. You might be able to find one for sale on eBay or borrow one from someone in the TV service business. Or you can take the TV to a shop where they can degauss it for you for a small charge. Just be aware there's a chance the picture tube may have been damaged if the magnet was very strong and was in contact with the tube for any length of time. A thin metal screen called the shadow mask is behind the tube face, and if that was warped by the magnet then the colors will never line up correctly again. If this has happened, even after degaussing the colors will still be wrong. But you won't know until you try. Good luck, and thanks for using Fixya!
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.
It's due to the magnetic field interferences from the speaker. At the first place, you shouldn't keep it near the speakers.
Always keep speakers far away from the Monitor.Now turn off the monitor and turn it on again,hope it solve the problem. You may even need to restart the system.
Moving magnetic fields (such as from an electric motor) can cause
flickering when near a CRT screen. A static magnetic field, such as
from your computer's speakers, can cause color shifts or incorrect
colors in the area near the magnet. This color shift is caused by parts
of the screen becoming magnetized. Occasionally the color shift will
remain after you remove the source of magnetism. To help reduce or
eliminate the color shift, you can use the degaussing option on most
monitors. Most newer monitors automatically degauss when you turn them
on, while older monitors might require you do to it manually. Most
monitors have a button or menu option that enables you to degauss it
manually. Degaussing a monitor will de-magnetize the inside of the
monitor, removing the color shift. Unfortunately, if the monitor is
exposed to the source of magnetism for too long, degaussing will not be
able to clear it up, requiring you to repair or replace the monitor.
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