Problem with Monitor

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Sword_Gun
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Problem with Monitor

Post by Sword_Gun »

Hey, Theres something wrong with my brothers monitor, and he wants me to ask around and try to get an awnser for whats going on...

Its sort of shaking, and the corners of the screen are rumbling, and all the words on the screen are shaking slightly.


He's tried rebooting.

Anyone know the problem?

The monitor is NOT a LCD, I think its a CRT (It has a big back on it, like a TV)
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Nicholai
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Post by Nicholai »

Try degaussing it.
Sword_Gun
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Post by Sword_Gun »

And How would I do that?
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sammy
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Post by sammy »

from wikipedia:

Degaussing monitors
Today the most common use of degaussing is in CRT-based computer monitors. For example, many monitors use a metal plate near the front of the tube to focus the electron beams from the back. This plate, the shadow mask, can pick up strong external fields and from that point produce discoloration on the display.

To combat this, CRTs add a copper coil wrapped around the front of the display, known as the degaussing coil. Tubes without an internal coil can be degaussed using an external hand held version. Internal degaussing coils in CRTs are generally much weaker than external degaussing coils, since a better degaussing coil takes up more space. A degauss causes a magnetic field inside the tube to oscillate rapidly, with decreasing amplitude. This leaves the shadow mask with a small and somewhat randomized field, removing the discoloration.


A degauss in progressThe high current surge which takes place during this automatic degauss is the cause of the audible 'thunk' which can be heard (and felt) when televisions and CRT computer monitors are switched on. Visually, this causes the image to shake dramatically for a second or so. Many televisions and monitors automatically degauss their picture tube when switched on, before an image has been displayed.

In most commercial equipment the current surge to the degauss coil is regulated by a simple PTC thermistor device which initially has a low resistance but quickly changes to a high resistance due to the heating effect of the current flow. Such devices are designed for a one-off transition from cold to hot at power up, so 'experimenting' with the degauss effect by repeatedly switching the device on and off is not recommended as it may cause this component to fail. The effect will also be weaker, since the PTC hasn't had time to cool off.


Also, tell him not to put magnets next to his monitor :wink:
bicostp
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Post by bicostp »

Turn it off and back on again. Or go into the menu (if it has one) and there should be a degauss feature.

He can do whatever he wants with the PC, but it won't make any difference.

If degaussing the monitor doesn't fix it, you might as well get a new one. Chances are it may be wearing out. How old is it?
Sword_Gun
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Post by Sword_Gun »

Its from 03'.

and He fixed it, he moved his speakers away form the Monitor
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Kyosho
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Post by Kyosho »

Sword_Gun wrote:Its from 03'.

and He fixed it, he moved his speakers away form the Monitor
Haha! Well duh! Sorry, it's just...so obvious. Speakers = Magnets = Bad for monitors. The others were right though, degausing would've been my first instinct as well. Well, other than moving the speakers away. Heh!

If they're not speakers designed for a PC, which is to say, ones with proper shielding, then you don't want them near your monitor. Or your older CRT-style televisions. You can permenantly ruin an old tv with magnets like that.

I shouldn't have told you that. You'll be sneaking into old people's houses and screwing up their tvs now, won't you?
daguuy
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Post by daguuy »

yeah that would probably do it. it can also do that sometimes if it's 60Hz. switch it to 75 or more Hz and it should be even better.
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