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Tv Screen Problems

I have recently switched my T.V. on and the sound is heard but no picture is on the screen, instead i have a green screen with lines through it and two faded colours of blue on  the left side of the screen and red on the other.


The tv has also started to power off intermitently


the TV is about 5yrs old


Any ideas 

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Re: Tv Screen Problems

As you see green screen with lines through it

lines you are seeing is called retrace lines.

the problem is due to green video output section failure

please check the followings as given

  • supply to green video output & video output itself
  • components in green video output circuit
  • crt base loose.
  • connector loose in video ckt.
  • signal from signal processor to  green video section is absent.

hope this will help.

good luck.


Posted on Oct 15, 2007

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I have a Panasonic TV CT-34WX50 every time I change channels

it sounds that have problem in the chroma board ( video board ) a small board that hooked up in the neck of the picture tube. if the color is greenish the cause is dead in red video driver transistor or open resistance. hope this can help good luck.

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Screen is bowed on top and bottom.

Projection sets have two very common problems outlined below.

The first common problem is convergence

These sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the picture to look normal. This is called convergence.

When its out of alignment the video will look 3-D, wavy, distorted, etc. The TV can also shut down when the convergence starts to fail.

Most of the time you just need to adjust your convergence in the menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired.

Convergence problems are very common on all Projection TV sets including Sony, Samsung,JVC,Philip Magnavox,Panasonic,Akai,Pioneer, Hitachi,Mitsubishi,Zenith, RCA and others.

You can more info and a DIY convergenece repair kit with instructions from TV Repair Kits using the link at the end of this article.

Here are some of the most common problems with these sets...

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Problem #2 - Another common problem is dull or washed out video.

Your set may have one or more of the following symptoms....

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You can see some more examples and find a fix using this link on Fixya

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1 Answer

Green picture

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I'm assuming this is a projection set given the size. Sony TV's have circuits to monitor picture tube operation and cut off video when something isn't within limits. It's very likely your set has one or more bad tubes (there are 3, for red, green and blue), troubles on the circuit boards connecting to them, or problems with the set's control circuits. This set should be serviced by a professional if you want to keep it.

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2 Answers

Samsung TV


Just read your list of problems The first fault (Diagonal lines & picture collapse from left & right) Sounded like either A poor connection or dry solder joint either on scan coils or scan coil plug / socket on main pcb.
If this were the case the engineer that called out should have spotted this & sorted it very easily. But you say it is still the same so what did he do ?
Did he give you a reciept with break down of what he did ? If yes please post it here for me to go over.

The sound problem you describe has thrown me a little so could you please post your tv model number on this page so I can see if this is a stock fault.

The static shocks you are getting is relatively normal & not a problem unless you are getting them off of speaker grilles or even tv casing if it is silver in colour.
I am UK based & have access to samsung technical but I will need your tv model number.


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1 Answer

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