Question about Toshiba 40H80 40" Rear Projection Television

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Convergence problem tosiba 40H80Hi

Hi can anyone help i fell on to my tv and when we put it on everyone was green we have had someone out to look at it and they have told us this is caused by wear and tear.I read on here somewhere that a bang to the tv can cause this is this true. also how long should the engineer be at your home to find this problem, as i have seen on here people saying it can take upto 45mins to warm up. Thank you.

Posted by kay ledsham on

  • kay ledsham Feb 04, 2007

    yes falling on to the tv can cause this problem.

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You may have jarred the sockets of the red and blue loose on the red and blue picture tubes. Especially if the picture was good before the fall

Posted on Jan 02, 2008

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Your TV most likely has one or more possible problems.

Problem #1: Convergence Chip Failure ( common problem )

Here are some of the most common symptoms and example photos of a convergence problem
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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 #1

You need to replace the convergence chips and convergence resistors. Check the site www.TvRepairKits.com. They have put together a kits for most models. If you don't see a kit for your set send them a quick note and they will put one together for you. Their kits include a photo instruction guide, original OEM Sanyo STK chips, convergence resistors, pico fuses, etc.


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.

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TV set after fluid change

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2c07611.pngSolution #2


What you will need to do is replace the coolant and clean the crt. You can get a repair kit from www.TvRepairKits.com that includes replacement coolant, photos. instructions, etc.
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