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Tech: Help; computer color mess

frogprince 19 Jul 13 - 01:31 PM
GUEST,Grishka 19 Jul 13 - 02:31 PM
Bernard 19 Jul 13 - 02:42 PM
Jeri 19 Jul 13 - 03:19 PM
Stilly River Sage 19 Jul 13 - 04:15 PM
frogprince 19 Jul 13 - 04:21 PM
Gurney 19 Jul 13 - 05:15 PM
frogprince 19 Jul 13 - 05:53 PM
JohnInKansas 19 Jul 13 - 08:30 PM
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Subject: Tech: Help; computer color mess
From: frogprince
Date: 19 Jul 13 - 01:31 PM

I'm a luddite, in that I still have (gasp) a crt monitor. Hey, It's worked fine for me. But. I had a glitch, maybe two years ago; the color went to blazes, with nothing but green close to the sides. Within a couple of hours or less, it cleared up, and the color has been very true, fine for photo printing and all. So, a couple of months ago, I got another brief repeat of the same thing. Now I'm on my second episode within a week or so.
Is this definitely in the monitor? (I would presume the color "guns") Any question at all of it originating in the "box"? Has anyone else had a comparable experience of this kind of mess in such widely separated episodes? And, in a word, is there any possible remedy except to bid farewell to a monitor that I've been very happy with?


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Subject: RE: Tech: Help; computer color mess
From: GUEST,Grishka
Date: 19 Jul 13 - 02:31 PM

One thing I know: printing photos has nothing to do with your monitor or graphics card. Either of these can be gone west; experience tells me that with 99% probability it is your monitor; it cannot last forever whatever the technology.

If you want to make sure, borrow your neighbour's monitor, or take your computer to a shop where you consider buying a new monitor. The second method has the added benefit that you know in advance that your new monitor works with your computer.


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Subject: RE: Tech: Help; computer color mess
From: Bernard
Date: 19 Jul 13 - 02:42 PM

As you're using glass CRT monitor as opposed to an LCD 'flat screen', it sounds like a magnetic field is nearby.

Loudspeakers could easily be causing the problem you describe. When CRT monitors were more common, computer loudspeakers had magnetic shielding to prevent such problmes, but LCD monitors don't need this shielding.

Some sort of external power supply (maybe the one belonging to your printer?) could also cause it.

You could try going into the monitor's menu and look for a de-gaussing option, which should correct any problems caused by such magnetic fields - but you must remove the offenders first!


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Subject: RE: Tech: Help; computer color mess
From: Jeri
Date: 19 Jul 13 - 03:19 PM

I've "lost" colors because of the plugs. Pins can get dirty or bent. I don't know if that's probable, but it's easy and cheap to mess with the plugs.


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Subject: RE: Tech: Help; computer color mess
From: Stilly River Sage
Date: 19 Jul 13 - 04:15 PM

Haven't you irradiated yourself for long enough with that old CRT? Flat screens are very modestly priced these days. Make the switch and you'll wonder why you didn't do it years ago. The increase in desk space is a lovely side effect of the new monitor.

SRS


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Subject: RE: Tech: Help; computer color mess
From: frogprince
Date: 19 Jul 13 - 04:21 PM

Bernard saved the day, THANK YOU! I hit de-gausseing, everything went wiggly for a moment, and everything is great. The one thing I wonder, is why the problem cleared up previously when I had no idea what to do.


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Subject: RE: Tech: Help; computer color mess
From: Gurney
Date: 19 Jul 13 - 05:15 PM

I've seen similar problems caused by running the signal cable to the monitor alongside the power cable from the wall socket.
This would concur with every fix you've done, even the one above if you managed to move the cables apart when you were groping for an answer.

Do you have your cables in a 'tidy?' Doesn't seem to happen when the cables cross, just when they run parallel. But this is with 240V main supply.


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Subject: RE: Tech: Help; computer color mess
From: frogprince
Date: 19 Jul 13 - 05:53 PM

No, I just have my cables in a "messy". I think it's probably the speakers that caused it; I'll try and get them relocated a little, and anyhow I know what to do now if it happens again. The other wonder is that I haven't had the problem more often, or chronically.


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Subject: RE: Tech: Help; computer color mess
From: JohnInKansas
Date: 19 Jul 13 - 08:30 PM

Older CRT monitors (and TV sets) generally did a pretty effective degauss if you turned the power off and then back on. It's possible that the mysterious recovery in the first instance was just because you did an (accidental?) off/on power cycle sometime during your fiddling with it.

For several old monitors I've had, there wasn't a degauss button, so that was the only method available for cleaning up the picture. If your monitor has a degauss, it's probably a "modern" CRT - maybe not even more than 20 years old. [friendly "dig," of course]

The cables generally used between computer and monitor usually are fairly well shielded, and with a single-cable connection cross-talk problems should be fairly rare, even if your "messy" turns into a rats' nest.

Should you decide to replace the monitor with a flat screen (a good idea, usually) the biggest problem you'll find is that the people who sell monitors now think that everyone should have a 72-inch monitor that is NOT MODESTLY PRICED and you may have trouble finding something that will fit in your room - much less on your desktop (or in your budget).

A significant advantage of a flat screen in my case is that it leaves space on the desktop for all the bottles of little pills I have to take daily so that I can keep them orderly for check-off as I take them. In her case it makes a comfortable space where the cat can sleep in front of the monitor - giving her mostly a cat's ass to look at that's much more interesting (IMO) than her Facebook. You'll need to assess what personal advantages a more modern screen would offer for your own use.

John


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