Question about Mitsubishi Diamond Pro 2020U (White) 22 in.CRT Conventional Monitor

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Total loss of picture

I've got a '99 2020u, and over the last several days the resolutions and the colors have failed, leaving me with a dark maroon picture that is impossible to read.

The problem didn't happen all at once, but got progressively worse.

The monitor would act like it was degaussing and then another color and level of resolution would go.

If there's a way to fix this, I'm all ears. I love the monitor which still looks better than any LCD I've seen.

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6 Suggested Answers

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Posted on Jan 02, 2017

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SOURCE: Distorted picture and multi-color words

You need to resolder the convergence chips. This is a very common issue with this line of TVs.'s Mitsubishi forum has detailed posts on how to fix this. Just serach for "55809 convergence" and you should find the info you need.

Posted on Dec 20, 2007

  • 6966 Answers



Most 17 inch monitors upward have two (2) focus adjustments. They are located at the back of the Flyback Transformer (FBT) together with the screen control. They tend to "drift" as you have posted after some time of usage. In the absence of calibrating instruments, you simply have to wing it when adjusting. It might be of help if you use a squarish mirror to view the front while adjusting the controls at the rear. Of course the usual precautions apply when working with live units especially within the high voltage area.

Should you not be comfortable opening the unit, adjusting while "live", you may need to seek the services of a qualified professional.

In some extreme case, no adjustment could and would correct a problem if the CRT has already developed some form of ion burn on its mask and therefore would require replacement. At times, you may need to consider the cost of repairs (parts & service) as well as the down time which may negate justification for repairs and therefore the prospect of a new monitor might be better off.

Hope that this be of some help/idea. Pls post back how things turned out or should you need additional information.

Good luck and kind regards.

Posted on Feb 01, 2008

  • 3130 Answers

SOURCE: Color loss

Your formatter or what is called the FMT board has bad capacitors on it.

Posted on May 27, 2008

  • 8617 Answers

SOURCE: Mitsubishi Model # VS-50609

try to resolder the convergence amp ICs that may help if not the ICs may need to be replaced. Let me know if you need further assistance.

Posted on Jun 22, 2008

  • 1148 Answers

SOURCE: VS-50803 50" Mitsubishi No picture problem

Sounds like your picture tube has went out,, or maybe something simple,, to fix,, i would at least let a tv shop check it out ,, worth a chance ,, nothin 2 loose,, good luck

Posted on Oct 05, 2008

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