How to repair tv with lines on display - Samsung LN-T4661F 46 in. LCD HDTV

Vertical lines across a TV screen can be caused by a variety of issues, including a faulty T-con board, a defective main board, or a problem with the display panel itself. Here are some steps you can take to troubleshoot the issue:

1. Check the cables: Ensure that all cables are securely connected to the TV and the source device (such as a cable box, gaming console, or DVD player). Loose or damaged cables can cause issues with the display.
2. Test the source device: Connect a different source device (such as a laptop or another TV) to the same input on the TV. If the lines persist, it's likely an issue with the TV itself.
3. Check the T-con board: The T-con board (also known as the timing control board) controls the timing of the image on the screen. If this board is faulty, it can cause vertical lines. You can try replacing the T-con board to see if it resolves the issue.
4. Check the main board: The main board controls the overall functioning of the TV. If it's faulty, it can cause issues with the display. You can try replacing the main board to see if it resolves the issue.
5. Check the display panel: If the above steps don't resolve the issue, it's possible that there's a problem with the display panel itself. Unfortunately, this is the most expensive part of the TV to replace and may not be worth the cost.

It's important to note that diagnosing and repairing electronics can be dangerous and should only be attempted by a qualified professional. If you're not comfortable with troubleshooting or repairing the TV yourself, it's best to contact a licensed repair technician for assistance.

On a modern LCD TV screen, white (or any color) vertical lines appear when the individual "tab bonded" wire connections of the ribbon cable servicing a column of pixels on the LCD display begin to fail.
From: https://www.nxp.com/wcm_document...
If the column wire is damaged and "stuck high," one of the 3 LCD display colors will show as a solid line.
From: http://www.avsforum.com/forum/16...
If the line is white, all three colors are "stuck on."
This could be a manufacturing defect of the panel, or a result of the TV operating in harsh temperature conditions.
Alternatively, the timing controller board (t-con) may be failing and not sending signal to the display in the first place. It could also be a loose connection of the ribbon cable between the t-con and display.
Test sequence:

• Reseat ribbon cables from display to t-con.
• Try replacing t-con. (Sometimes, solder re-folwing the t-con fixes the issue)
• Try replacing display. (Or, try applying pressure to the tab bonds)

Repairing the tab bond of an LCD display is a daunting, specialized task. Some folks have managed to fix them with heat guns or shims between the case and LCD (e.g., [Front Page] - Article: Howto: Repair LCD Tab Bond and TCON Issues), but those are hacks, at best.

if those problems were present when you got it back from repair, then, the guy didn't fix it fully.

if those are new problems - then you are now finding out why electronics and plasma displays wear out after ten years, replace the unit, don't pay to 'get it fixed' as the rest of the parts are old and about to also fail.

It's either the control board or the display itself.
You'll have to find a TV repair company. They won't be able to tell you for sure until they test it, and they may charge you to test it. The control board should be a cost effective fix, the display won't be.

Unless you're trained in Electronics, don't open up the unit and try to fix it yourself, there are hazardous voltages even when the TV is unplugged!

Line Defects On Vizio TV Screens - Vizio TV Help

vizhdtv.com/line-defects-on-vizio-tv-screens/

Aug 26, 2015 - If you see a line on your TV screen it might be the result of several causes. Some might be simple to fix and others may actually require you to replace theTV. Pixels on a TVs display panel are organized in groups of straight vertical lines. ...Notice the line defect above is red but they can be white, green, ...

how to repair vizio lcd tv vertical lines then fail - YouTube

? 17:05
https://www.youtube.com/watch?v=YUKMl7_19gk
Jul 5, 2014 - Uploaded by bam6972
how to repair vizio lcd tv vertical lines then fail ... I do know quite a bit, not everything but I do know my fair share about tvs. this tv needed a new ...

TV Repair Help for Vertical & Horizontal Lines on Your TV ...

? 2:47
https://www.youtube.com/watch?v=b0sI7LB4cZE
Apr 25, 2014 - Uploaded by ShopJimmy.com
TV Repair help with troubleshooting lines on your TV Screen. ... I have Vizio M470SL. My TV has .... Why does my T.V. suck Don't buy Rca T.V..

Common easy LCD TV fix: bad picture screen rainbow colors

? 4:04
https://www.youtube.com/watch?v=KWIWeESmXC0
Aug 10, 2014 - Uploaded by Tampatec
Common easy lcd tv service repair fix, TV's distorted rainbowpicture screen fixed by ... Common easy LCD TV fix: bad picture screen rainbow colors ... Need to report the video? ... Sanyo LCD with Distorted Half Picture Lines Waves Distortion Distorted ...Duration: 11:36. by Do It With Dave 316,733 views.

LCD Display Symptoms and causes. - YouTube

? 2:01
https://www.youtube.com/watch?v=DedJvyNm_s4
Mar 1, 2011 - Uploaded by Grants Pass TV Repair
With LCD TVs you can have the same display problems fordifferent ... Fix for Samsung lcd TV colour display problem - Duration: 1:26. by alwaysafix 462,823 views. 1:26. Sanyo LCD with Distorted Half Picture Lines Waves Distortion ... HOW TO FIX LED TV VERTICAL LINES ON SCREEN 55" MODEL LG ...

How To Fix A Broken Flat Screen LCD LED TV With Lines or ...

May not be a do it yourself repair, could be main board or even a loose connection at a plug inside the display panel (fatal) or outside of it.

The display unit is defective, some IC seems to be damaged, it can be repaired from any repair shop, but I don't think the cost will be low, as the display is manufactured by Sony and the spares are not available easily .

It probably needs the convergence circuit repaired by a qualified technician.

One of two things. the digital board, or the display is going bad. if the display is the problem it probably is not worth repair. The digital board my not cure the problem an is expensive.If the lines are different colors it my well be the display.