Question about Standard (CRT) Televisions

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Picture Having a problem with the picture. When you turn on the tv there will be a full screen picture or half screen picture briefly. Then it shrinks to a line running in the middle. This keeps going back and forth. However, there has been times when you turn it on and it works some-what normal with just a line at the very top. There is sound. Any thoughts? I don't know if it is worth getting it fixed.

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It sounds like a loose solder contact in the vertical circuit.
maybe on the vertical ic or some caps in the area.

Posted on Feb 24, 2009

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1 Answer

My tv has half a picture the other half is white


You hereby reports that the one side of the screen do not display picture, and the other side have. Is it seen vertically or horizontally. Will you please provide a detailed description of the fault you see on screen? google.com/+GopakumarGopalan

Nov 24, 2013 | GE 31GT660 TV

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27'' lxi reduced picture


This is a problem with the vertical circuit and can be as simple as poor solder connections within that circuit or defective parts. If you have no experience with soldering or TVs, this should go to a service shop. Expect a parts cost in the $30-$40 range for and IC +/or capacitors. If you'd like to attempt this yourself, please supply the exact make and model so I can post the parts required along with additional instructions. Please note that TVs contain potentially dangerous high voltages even when unplugged.

Thanks,
Dan

Mar 15, 2010 | Standard (CRT) Televisions

1 Answer

Picture is a blue screen but the cable and sound still works. The picture briefly appears when we turn on the tv then it fades to blue. Its a Prima tube tv.


It sounds like the picture tube is shorting at the blue gun. Most of the time it is not cost effective to replace the tube. Have a repair shop check it out and see if that is the problem. Thanks

Oct 21, 2009 | Standard (CRT) Televisions

1 Answer

The lower half of the screen is a black box on one channel


Check your closed-captioning settings. You probably have it set for "text". Make sure you turn captioning off and the problem should clear up.

Feb 12, 2009 | Recoton Advent Advent Q2035A 20" TV

1 Answer

Half screen showing


ok
keep tv off.
it will only get wors
if sumon dosent work on it soon
the problem you are having in the vertical section of the tv
hav a repairman resolider all conection on the vertical IC and check the serounding componets for falts.

regards daniel.
PS the repair takes me about 15 min.

Jan 13, 2009 | Samsung TXG2746 27" TV

1 Answer

Model 42mf231d/17 42" plasma


If the loss of picture is either on top half or bottom half of screen. there are y buffer boards that go from top to bottom on left side of screen when looking at back that control those sections. when there is loss of half of picture then buffer associated with that area would be at fault and would need to be replaced. when i see a degrading symptom such as loss of picture on top half or bottom half leading to no picture issue normally you would check heat syncs on y sustain board and if not heating up after a few minutes of being turned on would recommend replacing y main and both y upper and lower y buffer boards as they complete a circuit

Jun 04, 2008 | Philips Magnavox 27MS343S 27" TV

2 Answers

The TV is only showing half of the picture


Hi Bigtate,

There is not much for me to go on with your description but here goes,

I suppose you have a convential TV set with a glass picture tube and not one of the new types with the large screen slim style displays!!!

If it a glass type picture tube then the following assumptions are made.

I hope yopu have not shifted house recently and moved the TV around???
If you have its possible the Yoke (its a device on the neck of the Picture tube that controls magnetically the scanning dot) may have moved and only is letting you see half a picture...
This is a long shot but it could be the cause..

Now the picture is supplied to you by a fast moving dot of light (Black & White set) that scans from the top of the picture and moves very fast down to the bottom of the screen, then flys back to the top of the screen and starts all over again during this process the dot lights up the picture tube to provide you with
the picture you see... (On a colour set there are three dots)

Its quite a complex process and its all controlled by electronics inside the TV receiver.

If you are getting only half a picture then something is causing the dot to only turn on for the lower half of the picture during its write time to the glass screen,

You dont say if the half thats off is white or black, so there are many things that the service technician needs to know before even starting to look for this fault. During the dot doing its write cycle down the sceen, when it reachs the bottom and flys back to the top of the screen it receives a synchronous pulse from the TV station, and this TV signal is critical in making sure you see the same picture as is being sent from the TV station.
Sometimes this sync pulse from the TV station is very weak and so your picture may float up and down the screen trying to lock to the incoming signal.. this just may be your fault.. but you dont say if the half of the picture that you see is floating or not..
Your situation may be that your TV has partially locked to the station signal and your aerial may be problematic,
but then you dont say if its on just the one channel or all of your station channels. So there needs to be more analysis of your situation prior to a positive answer being provided....

Sorry I can be of more help...

From YUBEUT...

.



Nov 10, 2007 | GE 31GT660 TV

2 Answers

Cutting off the picture


please try once more in the memu on tv

 

Oct 14, 2007 | Sony FD Trinitron WEGA KV-36HS420 36" TV

1 Answer

Sony Trinitron KV-32S40 32" TV problem


This is a simple and common problem. The solder joints on the vertical output IC have cracked loose. I actually did a housecall on the exact same set with the exact same symptoms this morning! A good tech will resolder the pins of the vertical output IC and all other major solder joints on the main board and the set will play fine.

Sep 30, 2007 | Sony FD Trinitron WEGA KV-32FS100 32" TV

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