Question about CTX P772 17" LCD Monitor

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CTX P772 17" LCD Monitor Problem

Could you be more specific in the location of the IC you thinkis the problem? Also do you know of any suppliers of the replacement part?
Thanks

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  • markbose Dec 05, 2008

    BZZZZZZZ not even close to a right guess. If you read the question it goes in and out on its own. There is no hidden magic feature that changes the refresh rate in the background secretly in my os.

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This is caused by sending a video signal to the screen at a refresh rate higher than 60hz. A LCD Doesn't refresh the image by scanning from top to bottom like a traditional CRT or picture tube. They are hard set to 60hz and can not understand anything else. Setting it to anything else will cause it to not display a video signal, picture tearing (little blocks with horizontal movement), Offset video or convergents issues (colors appear offset giving it the 3d movie look with out glasses on)

To fix it you need to go into your operating systems display settings and pick out a LCD monitor with a refresh rate of 60hz

Hope that helps

Posted on Dec 05, 2008

  • Jay Brooks
    Jay Brooks Dec 05, 2008

    Sorry Posted to the wrong question... Please excuse my lame mistake.

  • Jay Brooks
    Jay Brooks Dec 06, 2008

    As I stated. I answered the wrong post. The solution I posted was for a offset image. Sorry for the confusion. Fixya should have a way to edit a post.

    If your screen is fading in and out it is most likely a failing power supply, ballast or a capacitor. If it is a "bad IC" like someone else posted... You would most likely not be able to turn it on at all. Most IC's in modern electronics are programmable logics like a PIC or a AVR.. In this case you are screwed and you may as well throw it out unless you have the means and experties to remove/copy/replace the current micro controler. IC's rarely fail. Microcontrolers do fail but not because of a bad chip.. they fail from poor programmers writing operating logs to flash instead of memory.


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