Solved

LCD monitor's colors tremble, coloured pixels everywhere

Posted on 2006-10-23
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Last Modified: 2009-12-16
This started about a week ago, when I started the pc, my desktop, wallpaper, taskbar were all surrounded by red green blue orange or purble pixels, that were flashing, i.e. appearing and disappearing at various places, like a winamp visualation :P. I managed to get over it by using an all-white screen saver and giving the monitor sometime off.

However, today the problem is still persisting, and even if I get over it it is only for a few minutes - then the corruption returns. I tried putting the monitor on VGA instead of DVI, changed some settings, refresh rates, reducing brightness but nothing particularly helped. Please help. Thanks.
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Question by:m3lis
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LVL 69

Expert Comment

by:Callandor
ID: 17788173
Narrow down the problem by trying another monitor - this could be the monitor or the video card.
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Author Comment

by:m3lis
ID: 17788515
It is the monitor, as I tested it on my other PC.

From my searches, I found out that this may be the image persistence / burn-in problem, but I am not quite sure, as the images are not burned in, they are hust surrounded by various coloured pixels. Any additional info would be helpful.
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LVL 69

Expert Comment

by:Callandor
ID: 17788600
LCDs do not suffer from burn-in, as CRTs do.  Check the cable for a loose connection or bent pin; if this is not the case, try a different resolution and see if the problem continues.
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Author Comment

by:m3lis
ID: 17788853
They do suffer - it is just temporary in most cases, according to what I've read.

I tried a different resolution, and a different refresh rate but it did not help.

I also tried using a VGA cable instead of a DVI but the corruption was the same.

Also, when it is not connected to a computer but is powered on, the monitor displays a "no signal" blue box with some red pixels on it!!!
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LVL 69

Expert Comment

by:Callandor
ID: 17789283
> when it is not connected to a computer but is powered on, the monitor displays a "no signal" blue box with some red pixels on it!!!

This is a clear indication that the monitor is faulty and needs to be replaced.
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Author Comment

by:m3lis
ID: 17789763
Is this possible however? It is only a few months old.
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Expert Comment

by:Callandor
ID: 17789968
"New" is not a guarantee that it will last the expected lifetime - mean time before failure is a statistical measure, which means some last longer and some last less.  Some brands are better than others, also.  Which brand was this one?
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Author Comment

by:m3lis
ID: 17790368
It is a Viewsonic $600 monitor, this is not logical.
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LVL 69

Expert Comment

by:Callandor
ID: 17790473
I can understand your disbelief - $600 is a lot for a monitor, and it should work properly for a long time, but from what you tell me, it's broken.  Is there a "reset" in the controls?  If not, I don't have any other suggestions except to bring into a repair shop or replace it.
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Author Comment

by:m3lis
ID: 17791130
What do you mean by a reset? Also, would any shop fix it or does it have to be Viewsonic, cause I bought it online from the US and there is no such shop here.
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LVL 69

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Callandor earned 500 total points
ID: 17791278
I mean either an onscreen menu item using the monitor controls or a button of some sort that sets everything back to defaults.  Any shop that advertises itself as being capable of repairing monitors should be able to do the job.
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Author Comment

by:m3lis
ID: 17791376
Lets hope you are right. Thanks
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Author Comment

by:m3lis
ID: 17795232
Would changing the backlight help this situation?
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Expert Comment

by:Callandor
ID: 17801057
No, the colored pixels are an indication the wrong pixels are lighting up, not that there isn't any light.

Was my advice that bad, as to merit a "C"?  I thought I answered your questions.
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Author Comment

by:m3lis
ID: 17802119
I am sorry - it was not bad, you just did not tell me a solution I did not already know.

From my research, I found out that the monitor's inverter is failing, though I cannot find a new one on the internet to replace it.
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LVL 69

Expert Comment

by:Callandor
ID: 17825914
Well, sometimes the correct answer is what you suspect it is.  I don't know what other information I could have given you to solve the problem, other than the path you are taking.  See this note about grading guidlines: http://www.experts-exchange.com/help.jsp#hi73
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