Question about Toshiba CF32G40 32" TV

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Rainbow pattern on CRT TV

My TV took a tumble while moving it to a new entertainment center.  Despite that it fell a good 20", face first, onto a hardwood floor, the tube is still intact.  Unfortunately, the picture now has pronounced regions that are saturated by with the various three RGB colors.  The picture is otherwise good.  Because this occurred directly after the fall, I did not think of trying to degauss it yet, though I'll give that a try this evening. 


I'm an EE with access to test equip and have been 'bitten' before so I'm careful while working inside HV sources.  Unfortunately, beyond understanding the basic theory of operation, I've got very little idea how the fall may have caused this problem. 


Any help or suggestions would be greatly appreciated!


Thank you!

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Re: Rainbow pattern on CRT TV

If degaussing doesn't work, it may just be time to pony up and replace the crt as it sounds as if the shadow mask inside the tube has come loose. And, as you know, there is no opening that to service it.....accordianman

Posted on Oct 16, 2007

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Rainbow screen aiwa tv,, screen shows different colors like rainbow// brushing a magnet infront of the screen fixes the issue temporary

Picture tube is magnetized. Manual degausing is required. already you have done this.

Since you say it is reappearing, you have to check the following.

1. Relocate the TV or relocate if you have placed any tower speakers
or home theater speakers close-by.

2. Check whether auto degauss functioning OK. In the MENU
check whether you switched off auto degauss option. If it is OFF
enable it to ON.

3. Finally re orient the direction of your TV and watch the rainbow
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Repeat the process. It should disappear.

Magnetic toys or any other devises using magnet will cause this problem.

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1 Answer

Has rainbow lines on tv screen

shadow mask is warped. tv might have been dropped. crt is bad(picture tube). try deguassing it. if you dont know what that is take it to your local service center. the rainbow effect is a magnetic field of some sort. try unplugging and move to a different location. could be a speaker too close to tv.

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I have a rainbow of color about the screen. The TV fell out of the stand and now the color pattern is messed up. It fell face down.

sounds like a degaussing (magnetizing) problem.could be that the posistor inside the TV set got loose when the tv fell down. If you have experience soldering electronic components, you should be able to fix it by re-soldering. Otherwise, call a tv tech to do it.

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sorry your tv is distroyed
you need a new screen
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ur tv needs to be degaused using a degausing wand or ring. mos def needs to be taken to a professional to be done.

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Hey there well what i think happend is that the convergance has been modified and some parts has moved inside the TV. There's lots of posts in this website about this problem so just search for convergance. also check this link it will exlain you exactly how to deal with it Let me know if you need more help :) Tom

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Rainbow on the tv

The only time I have seen that symptom is when the shadow mask of the picture tube gets loose,What that means is you might be looking at a bad crt,color splashes could be a purity problem but rainbow lines are not.Sometimes that happens by itself or by being drop.Good luck

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