How can i troubleshoot a crt tv with colour problem.

Common easy LCD TV fix: bad picture screen rainbow colors

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LCD Display Symptoms and causes. - YouTube

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sorry it seems your main picture board ( colour prosessing ) is faulty and will need replaceing

its a magnetic interference just get the digausser it will be proper

This is a picture tube type TV. No lamp.
You don't describe the distortion.
A colour green picture that is twisted and shifted away from the other colours is a convergence problem. see Projection TV Convergence on this site.
If the green is smeared, out of focus, larger than the other colours like a halo around objects, things like that, it is the green picture tube. Sony has discontinued most of the picture tubes so you may not be able to get this fixed.

if you say that your picture gets distorted you mean like it moves to a side? do you see a black middle block?

if it's a yes?

so its probably the light engine. you need to change it!

does it looks like this?



try this link.. http://www.discount-merchant.com/1069179-HL-N5067W-p/1069179.htm

the price is more or less depends on your TV model... $279.00

Projection TV sets have several common problems listed below.

Problem #1) Convergence

Symptoms:

• Screen Looks 3-D
• Colors wont align
• Screen may look distorted
• No Audio/Video - makes a chirping sound.

Example Photo:

Problem #2 CRT Fluid has clouded over.

Symptoms

• Dull Video, Washed out
• White/Bright looking video
• Halos around objects
• Red/Orange looking

Example Photo:


You can see more examples and find a fix here...

http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

I'm having the same problem, red picture. Did you find a repair person and if so what was the problem and cost to fix it? My television is only 4 years old so I'd prefer to fix it if it's cost effective.

actually your tv set was placed near object produced magnet especially speakers, used magnet, small one to de-gauss or just like cleaning the the tv screen untill impurity colors gone. need my [email protected]

it is due to poor focusing please check 1 set with focus control fitted on flyback transformer, 2 check focus control wire comes to crt base is loose or some foreign material deposited on it. 3 crt base loose contact. 4 if tv is old then there is a possibility of crt is getting weak. if you are not a technical person do not open set as tv has very high voltage inside. hope this will help.

check to see if you do not have speakers on the side of your tv or any where around it.which could be causing your problem.