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tv discoloration
Trimeister:
Hello Everyone,
I'm new to this forum but I'm here because I have an issue with my tv and wondering if you guys can help me out.
I recently finished with my upright cabinet using a rotating 20" Apex tv. While in vertical mode the color in the corners are not the same. Its different than the original game. I've noticed that when I rotate it back vertically slowly the color came back slowly. Looks like the color changes depends on the angle. I was told that it could be the magnet from speakers because I do have 4 small speakers(Cambridge) on each corner of the cabinet. I removed the speakers but that wasn't it. The only thing left I could think of is that the tv motherboard doesn't rotate when the tv does. Could that have any effect?
PS-the color in any horizontal games are fine it only affect vertically.
Please help, any advises are greatly appreciated,
Thanks,
Trimeister :-\
MameFan:
It's not due to the speaker (unlikely, especially if they are shielded computer speakers).
Actually, it's due to the Earth magnetic poles themselves.
When you twist a TV or computer monitor (even on a flat surface, not even rotating to portrait mode), you change its orientation with the earth's magnetic fields.
Turn your TV, then turn it off for at least 20 minutes (some TV's as little as 5 minutes). Then turn it back on. It should re-activate the "Degauss" circuitry and demagnetize the tube IN ORIENTATION TO THE EARTH in the direction you have it.
But if you change it back to horizontal, you will again encounter discoloration--but now in that mode, unless you let it degauss (demagnetize)
Trimeister:
Thank you MameFan.
I'll give it a try.
SNAAAKE:
i know i am jumping on this,but i just got a small monitor problem today..damn damn damn..i mount the monitor correctly..its horizontal...while i was drilling the wood i bumped into monitor with my drill..its only minor..but then i got color disorder,(a spot where i am missing coler and odd colars are there) on the upper left corner...i also got some speakers installed..no idea if they are shielded or not..i just broke open a pair amlified speaker then screw them in a piece of wood..any idea anyone???also what is disgussing coil..why should i buy one.will this coil thing do the trick..i dont know much about monitors..i know other stuff really well..but kinda week in the monitor part..afterall..i dont like enjoying monkeying around inside the monitor and get killed :-\
MameFan:
> bumped monitor...
Actually, your bumping the monitor likely DIDN'T cause the color problem.
You see, when you have a motor, it works by creating a magnetic field (with electricity and an electromagnet) around a rotating fixed magnet. It causes the inner piece to spin, and thus turning the drill.
You actually magnetized the side of the tube (likely the metal shadow mask inside the front of the tube that separates the RGB guns to hit the right phospor points).
You must now DE-MAGNETIZE it.
Is this an arcade monitor or a TV set or Computer monitor?
MOST should already have a degaussing circuit and coil.. Look for it wrapped just behind the face of the tube (somtimes on the widest edge, sometimes just back a bit where the tube starts slanting inward towards the back). It's a pair of wires wrapped in what looks like tons of black electrical tape, and it loops around the entire tube.
If you shut off your monitor for a long enough time, then back on, it should reactivate the degauss circuit and try to remove more magnetisim
If you magnetized it too much, (or it's lacking deguassing capabilities) then you'll have to either buy a degaussing coil or, if you have one, try a BULK TAPE ERASER. The trick is to hold the coil or eraser away from the set, then bring it inward towards the set (you might aim just at the corner that's bad) and swirl it around a bit, then pull it at least 6 feet away, turn it, then turn it off.
Do NOT turn it off while in front of the tube directly. It will then reapply the magnetic field, doing nothing.
If this doesn't work, then as a LAST resort, you can try to "magnetize" the tube in the bad corner in the OPPOSITE direction. Basically take a big speaker magnet (break apart an old car 6x9 speaker). Move it up to the monitor (with it on preferably so you can see your results). and then with a solid color screen that is bad in that corner, swirl the magnet around and pull it away. If it got worse, then flip the magnet over and try again.
I've fixed a couple monitors this way.
Remember... Power tools contain features that create magnetic fields. NEVER use them (even battery operated ones) next to a picture tube... You will end up magnetizing it!
Re: Speakers.
To test if speakers are shielded or not, take a TV or monitor that you dont care about. Turn it on with a solid color screen. Move the speaker (especially the back) towards the monitor. If it produces a Purple or Green tint and moves stuff on the screen, then it is NOT shielded. If it does nothing, then it is shielded.