Question about Toshiba CF27H50 TV

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Toshiba model CF27H50 made a slight popping sound when turned on. The TV screen images are mostly green; no red, blue, yellow, etc. colors are prevalent. This the first time this has occurred. I have only tried a factory reset, yet the problem persists. What is/are the cause(s) of this problem? What part(s) will I need to resolve this issue? Any assistance provided would be appreciated, and thanks in advance.

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  • Toshiba Master
  • 6,771 Answers

From the description you have provided it is the picture tube, the popping sound has come from the guns and created a grid short in the picture tube itself knocking out one or two primary colors. This can not be repaired short of changing the tube which would not be cost effective, the money would be better spent on a new set.

Posted on May 20, 2011

Testimonial: "Bravo!"

  • C TATE May 20, 2011

    Thanks, for your speedy reply Cunninghame. A new purchase is something that I have dreaded. Yet, I have had reliable service from this unit since its 10/1998 purchase. Well,... it's time to research its replacement (Wow, a 21st century TV!). Again, many thanks.

  • John Cunningham May 20, 2011

    Glad to be of service, John

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I have a toshiba tp50h50 rear projection tv and their is a blue shadow behind the words and makes the words a little blurry


Sounds like you need to do a color convergence. If you still have the owner's manual, it will give great detail on how to do this. The convergence menu is accessed from the video menu on the tv.
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Re: Toshiba 65 in Cinema Series - 12 years old. Color Separation. Green bow at top center of screen, red and blue double images tilting upwards toward sides. Sometimes clears unassisted after set has...


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Projection TV sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the video to look normal. When its out of alignment the video will look 3D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the TV menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired.

This is a very common failure on these projection sets and a fairly simple DIY fix. All projection sets including Samsung, RCA, Sony, Philip Magnavox, Panasonic, Pioneer, Akai, GE, JVC, Toshiba, and others at some point will have the same problem.

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Here are some pics of convergence problems.


7859b01.jpg

e87380c.jpg

Common Problem #2) CRT Fluid is Cloudy

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Picture of a set that needs the fluid changed.

578ba6c.jpg
TV set after fluid change

65af323.jpg

69189a5.pngSOLUTION

You 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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1 Answer

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All projection TV sets have two very common problems. One is convergence ( 3D/Warped video) the other is CRT fluid ( Dull Video). Here are more details and solutions for both.

Common Problem #1) Convergence has gone out

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Common Symptoms include....

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Here are some pics of convergence problems.


7859b01.jpg

e87380c.jpg

Common Problem #2) CRT Fluid is Cloudy

Projection TV tubes have a liquid coolant that is used to keep them from overheating. After many years the coolant in the blue and green tubes will become cloudy and cause the screen to look dull, red/orange, etc. You may even see halos around images.

Picture of a set that needs the fluid changed.

578ba6c.jpg
TV set after fluid change

65af323.jpg

69189a5.pngSOLUTION

You 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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701cb04.jpg
77ea520.jpg
f0900cb.jpg

2c07611.pngSolution #1

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701cb04.jpg
77ea520.jpg
f0900cb.jpg

Here is a quick test....

Using your original remote go-to the tv settings then goto the convergence section.

Try to adjust the red and then the blue convergence.



You should be able to move them up, down, left, and right.

If you can't move them in all directions your convergence chips are bad and should be replaced. This is a common problem.


2c07611.pngSolution


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