I have a Samsun ls hdtv brought in 2011 recently I have a blue horizontal line in the middle of the screen and is getting wider on the left side of the screen. Is this worth repairing? How much worse can I expect it to get?

Samsung LN46B650 Thin Black Horizontal Lines - Forums - CNET

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Plasma TV Repair Horizontal Lines - How to Diagnose ...

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Sep 2, 2014 - Uploaded by ShopJimmy.com
I have thin horizontal black lines on the top and bottom areas of my TV. .... Hi, I have a 2011 64-inch 3D Samsung PN64D8000 Plasma TV.

how to fix horizontal or vertical lines on lcd tv - YouTube

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https://www.youtube.com/watch?v=k2QpYJp6MU8
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Hi my LG 47ln5700 tv set has thin greyish black horizontal lineson one side of the .... I hope this works good with Samsung LCD as well....

It means your picture tube is going out. It is just a mttter of time and it will go out completely.

the problem of your unit are at the horizontal section..

I unplugged the TV from the power strip and let it sit for a few minutes.

did you check the six 3.5 pico fuses that are next to the ICs? They will often be open ( blown) when the ICs fail. Also check the two 5 amp IC protectors on the G board as those protect the two ICs so its possible they have blown also a 5 amp pico can be substituted for the two IC protectors.

It could be a defective Y-Buffer board, or a defective Plasma panel.

Convergence power supply needs to be rebuilt as its no longer available new. You can get the board rebuilt at the following link and its fully guaranteed.
http://servicemanuals.vstore.ca/

Both sound like bad LCD panels. The following must be answered to confirm this:
Do the lines appear on all inputs/all signal sources?
Can they be seen in the OSD/menu?
If yes to both questions, it is likely that the LCD panel is bad

You have a completely different problem. The screen voltage for the blue picture tube is slightly too high on your set. This will put fine lines in the background of the picture, called retrace lines. This is very common and easy to correct. Remove the front speaker cover and the access panel behind it. Look inside and you will see a black box with six controls, each control having a little white glue on it. This is the Focus/Screen block. Three controls are labeled Focus and three are labeled Screen. The screen control in the center is for green but I am not sure if the screen control on the left or right is for blue for your model. With the TV on, set it to VIDEO 1 but do not connect anything to the VIDEO 1 jacks. This will produce a pure dark picture, showing any faint lines in the background. Choose one of the screen controls and increase (turn clockwise) it slightly. If the blue lines do not get brighter it means you are turning the red screen control, so put it back where it was and choose the other screen control. When you find the blue screen control, decrease (turn counter-clockwise) it until just when the blue lines are gone. If you want you can check that the red and green screen controls are set to just below the point where their faint lines are visible. When done, replace the panels and your picture will be back to perfect.

Hello, the problem regarding horizontal blue line can be around vertical output stage with IC(LA78045). Please check for cold soldering, resolder the suspected solderings. Best regards.