Question about Zenith Computers & Internet

2 Answers

I have a Zenith model CD15MNTCI from 1991. It comes on and the colors are fine, but there is a slight wave/distortion that make the picture look funny. Sometimes it is worse than others. Any idea what causes this and how i can fix it?

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  • fad126 Oct 26, 2010

    This is not a monitor for a computer. It is from 1991. It was used for a video game store display unit. However, it is not a TV. See initial post for model number.

  • fad126 Oct 26, 2010

    Is there any way to tell which one is failing? Which section of the circuit board would I look at? Is the a fairly common problem and an easy fix?

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Sounds to me like a failing capacitor in the power section of the circuit board.

Posted on Oct 26, 2010

  • Mohamed Omran Oct 26, 2010

    You should check the section of the circuit board which is directly fed from the AC power source. You should be able to see several electrolytic capacitors. These should be tested & any one of them that is found to be faulty should be replaced. You will have to possess at least basic soldering skills in order to be able to complete this job.

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This problem comes up when you are using the monitor at a slightly higher resolution or refresh rate setting that the monitor can handle. Try to lower down both of the settings (start - settings - control panel - screen - settings) and check the results. In case the picture looks better, increase STEP BY STEP resolution and refresh rate (one at a time) in order to get the best result. Keep in mind that if a setting is out of range that the monitor can handle the screen will be black. AT THIS CASE DON"T DO ANYTHING, after 15 seconds the screen will come back at the previous setting. Sorry your monitor it too old and I can't find the official settings for resolution and refresh rate. However the official settings are not guarantee that are still working since the monitor has too many hours "on duty".

In case of a problem or clarification, don't hesitate to post me a reply before rejecting my answer.
If you are satisfied, accept my solution.

Thanks and regards
Stelios
direct fixya link: http://www.fixya.com/users/technical114

Posted on Oct 24, 2010

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Convergence problems are very common on all Projection TV sets including Sony,Samsung, JVC, Philip Magnavox, Panasonic, Akai, Pioneer, Hitachi, Zenith, and others. You can get a convergenece repair kit wiith instructions from the links below.

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You can see some more examples and find a fix here
bb0cf99.pnghttp://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

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Another common problem is dull or washed out video.
Your TV2_bing.gif may have one or more of the following symptoms....
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When its out of alignment the video will look 3-D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired. Convergence problems are very common on all Projection TV sets including Sony, Samsung,JVC,Philip Magnavox,Panasonic2_bing.gif,Akai,Pioneer, Hitachi,Mitsubishi,Zenith and others.
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*Dull looking picture
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*No Audio/Video - TV Shuts down - May also make a constant chirping sound

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Your set may have one or more of the following symptoms....

*Dull looking picture
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bb0cf99.pngYou can see some more examples and find a fix using this link on Fixya http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

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