Question about JVC AV-36950 TV

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Black Lines in picture

I have one (very thin, barely visible) constant black line in the center of the
screen, and various size dancing black lines in the bottom two inches of the screen.

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  • 124 Answers

You may have a bad cable, bad connection, interference or all of the above. Try wiggling the cable and see if that helps. You could also move any other electronics away from the cable (if possible) and/or change out the cable (cable tv/antenna cable) and see if that clears it up. However, if the line does not appear to have any information in it as though it was just missing then your problem is a hardware issue that will require a trip to tv repair shop.

Posted on Sep 24, 2008

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Posted on Jan 02, 2017

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1 Answer

Picture went black except for partial green and blue lines &2 thin red lines


Vertical scan section circuit fault. Check and replace damaged component/s at its vertical scan output section circuit. If you wish to get some details, check the site linked here. Pull up older posts. Check the site in 'Mosaic' view. It will make search easy. http://electronicshelponline.blogspot.com/

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Samsung tv size 42 inch


your tv may need to have the service team reset the system. those lines represent system program protocol from the factory. nothing can be done unless you take to where you buy

May 29, 2013 | Televison & Video

1 Answer

Lines on the screen


Hello
If the lines are thin and spreaded allover the screen from top to bottom, and are equally spaced around one inch of so apart, it will be a screen voltage rise problem. You just decrese both brightness, contrast and colour contols of your TV to zero position, and look into, where there is lines are visible on the screen or not. You should notice this in a drak room, so as to see is well, or close all the doors and windows to make the circumstance to a little bit dark.
If you can see these lines still, it is clear evidence of the above said fault. To rectify this fault you should open your TV. Open the back cover of the TV, and you will see a Line Output Transformer. It is otherwse known as LOT. It can be recoganiized easely as it its size. Normally it will look black in colour and a thick wire from it goes the picture tube's final anode, and look like it is stcked to it with the help of a rubber ******. Other two wires from it goes to the picture tube base board. These two wires are, one for focus and the other for screen.
There will be two controls on the lot, which can be varied, and seem to be integrated with LOT. Among, upper one is for focus adjustment, and lower one is for screen adjustment. Both will be marked as "Screen" and "Focus". You just find out the screen control. With the healp of a screw driver it can be adjusted.
Keep the TV on, Brightness, Contrast and colour to minimum, adjust this control to a little [ a very little movement should be done, otherwise the picture will be get blurred], to just eliminate the lines you see on the screen. Focus control and screen controls are interactable, that is adjusting one may effect the other. After eliminating these lines just up the brightness and contrast control to at about their mid position and press the menu button on the TV or remote control to get the menu screen. Look at the letterings, and if it seem to be out of focus only, just adjust the focus contorl to get well focused captions. The adjustments are hot, that is while the TV is operating. Take care. Ok.

Oct 26, 2010 | Mitsubishi CS-40503 TV

1 Answer

Black screen with a line of the picture running


The vertical sweep generator is dead. The circuit that controls the lines being drawn from top to bottom has malfunctioned or died. This not something you can fix, you will need a professional.

Apr 02, 2009 | Emerson EWF2703 27" TV

1 Answer

No Picture On Screen


change the 33uf 35v at the vertical filter

Thans!

Mar 10, 2009 | Televison & Video

2 Answers

Picture is now a thin horizontal line


now only visible in a thin horizontal line. first of all you reduce brightness to monimum. it just to protect your tv from crt demage. your problem is in horizontal output section as you have mentioned that week or so ago the right and left bottom edges of the picture began to move in like a sideways triangle filled with black so this sympton is due to hor. section problem. your flyback transformer or horizontal output might be defective. but remember check for power supply is ok from surge protector hope this will help.

Oct 07, 2007 | Hitachi 35UX80B 35" TV

1 Answer

Thin horizonal line in middle on dark screen


The several thin white lines at the top of the screen is the warning that the vertical output IC is not getting the boost voltage it needs to run correctly. The IC cannot operate for long like that and shorts out inside, which is when the vertical collapses altogether and you get the thin white line through the center of the screen. The good news for your son is that he had nothing to do with that, and it has nothing to do with the cable F connector. The set needs to be serviced by an experienced tech who will restore the boost supply and replace the vertical output IC, and when I do that I charge $75 but techs in your area will vary, so be sure to ask around.

Jul 26, 2007 | GE 24GP653 24" TV

1 Answer

Screen went full bright one day.


Hello, please check the 10uf/200V capacitor around flyback transformer. Best regards, Arpi

Jul 17, 2007 | JVC AV-27230 27" TV

1 Answer

Black screen with green smiley face


If your tv has a picture tube,your problem is in it. If you have only one line now,the vertical circuit is not working. You could have jarred something loose around the picture tube.Maybe a yoke lead ???

Jan 13, 2007 | Mitsubishi VS-60607 TV

1 Answer

Beautifull picture except for a jiggling black line in pricure


your tv is having horizontal problem take it to a tech in order that the hrizontak deflection circuit be checked it also might have abad yoke

Dec 28, 2006 | Samsung TXF2899 28" TV

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