How to Fix LED LCD TV with horizontal & vertical lines on the screen

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Hi, I'm Paul an electronics tech from NYC area but live in Tampa bay area currently aka Tampatec, I post weekly usually on the weekends. My Howto tech channel is aimed for the novice tech or anyone that wants an easy to follow tech guide or wants to easily learn how to setup, use or fix their electronics. whether it's LED LCD TV, tablets, phone repair, home automation setup, Google Home, Chromecast guide, Echo dot tutorials, just to name a few. I'm here to help for free, just subscribe.

*DISCLAIMER When working on electronics or installing, act at your own risk. follow safety manuals and / or NEC safety codes, unplug power, please watch other howto videos for a better understanding. Tampatec is not responsible for damages or misunderstanding info in the videos.

I believe in this famous quote- give a person a fish they eat for a day but teach that person to fish and they will eat for a life time.

Thanks for watching and your support!

[billcarter]

Just cleaning the connectors with q-tips and eye glass cleaner and blowing off the circuit board cleared the multi-colored vertical lines. Wow saved repair and replace costs! Great

[redkelly]

I just wanted to thank you for these very helpful video's. I recently took on a new job in my company. I now repair flat screen TV's and your video's have been a true blessing. Thanks and keep them coming!

[sybildisobedience]

This is the best how-to video on the subject which also mentions slight variants and it was done in less than 5 mins. Definitely subscribing. Thank you!

[nickrinaldi]

Nice and simple instructions without a long drawn out story. Good job!

[DavidSmith-vond]

Thank you showed my broth this video and is fixing his TV by himself!!

[moevit]

@TampaTec
I have a 2014 Samsung Plasma TV (PN51F5500) that has developed a one pixel wide solid steady green vertical line that goes from top to bottom on the right side of my screen. It does not flicker and it's there no matter the input, coax, hdmi, etc.
I've done a bunch of troubleshooting from voltage checks, to putting pressure or wiggling on the screen flex cables, to inspecting and cleaning board to board ribbon cables, and nothing shows problems or makes any difference to the screen, except for one thing.

When it comes to the two ribbon cables that go from the tcon board to the bottom buffer boards, if I disconnect the left side ribbon cable, so only the right side of the screen gets image, then the vertical line becomes a solid steady blue instead of green. Then when I reconnect the left cable and disconnect the right cable, so only the left side of the screen has image, instead of it being a flawless picture, it has four vertical lines in the picture. Three of those lines are only one pixel wide, and the fourth looks to be two or three pixels wide. The wider line is a purply/black color, two are black, and one is green. Those four vertical lines are closer to the center of the screen and are all spaced about an inch or two apart, but are not equally spaced.
When I reconnect the right cable (so both tcon ribbon cables are connected), everything goes back to as it was before disconnecting any cables, with the screen being flawless except for that green vertical line on the right side of the screen.

I should also mention that about a week ago the tv did a firmware update (2230->2240). I didn't notice any problems between then and now, other than maybe what I would call a bit of slow motion here and there when specifically playing PS4 games, but that very well may be due to just the console and not the tv. I did speak to Samsung about this and they say there's no problem with the firmware and that's definitely not the problem. They also confirmed that the firmware can only be updated and never reverted for some reason.

If I assumed there's not possibly a bug in the updated firmware, then it would seem to me that the likely cause is either tied to the screen itself (including the IC chips on the directly soldered flex cables) or some fault with the main processor board (because the tcon is built into it on this tv). If it were the processor board, then it would cover both a potential hardware or firmware problem with it. The processor board is still costly enough that I can't just wing it and hope it works, but if I can be relatively sure that's the problem, if it is, I will spend the money to keep the plasma going.

I'm curious as to what you think? I know a solid steady colored line typically means a screen issue, but I can get the line color to change by disconnecting one ribbon cable, plus the opposite side of the screen shows lines as well with the other ribbon cable disconnected. It makes me question whether or not it is the screen is actually the problem. Hopefully your experience can give me better guidance as to how to move forward.

Best guy on tv been watching him for years Nerver fails top

[nimalp]

Thank you. It really helps us. We like to see more videos of this sort, so that we can learn something. Appreciate it.

[manteksarai]

@Tampa Tech Hi, i'm from East indonesia🇮🇩, Timor island near Australia, Good explanation simple clear and easy to do. 👍👍

[bzibubabbzibubab]

I tried to let go of one, instead it turned black, not just the one whose screen is on, so it's full black. I try to remove the flexible next to it, the screen is also black just like when removing the first flexible. I greatly appreciate your help, thank you so much

[manzinitakavingofa]

Thanks man i was on the edge, but not after this video. now i know my next step in repairing an LG plasma TV.

[budandbean]

I really enjoy so much of what TampaTec does here, they are just the greatest! Someday if I happen to get closer to Tampa from where I'm at (about two hours away now) I want to look you up and shake your hand for all the wonderful advise. Tampatec Rocks! 👍👍👍

[zay]

I have an LG tv that has horizontal lines on the bottom 3rd of the tv that comes and goes. Picture is fine but the lines show up in static form off and one. Will replacing the t-comm board fix it?

[rafaelhuicochea]

Yes please, keep those videos coming!

[josephhouser]

Very informative. I have a 8 yr old Samsung Smart TV that developed 2 vertical lines. This will help me a lot.

[voxjhay]

Thanks for the Info bro..
i just fix my LG tv 32ls3510
i used hot air on my T-com board and clean some flex
thanks to you i just diagnose my TV correctly..

[derektierney]

Got 5lines (different colours) to the left side of my sharp TV was wondering if it was fixable & I guess so after looking at your video. Great video & very well explained as I'm gonna give this a try. 👍👍👍😁🇮🇪

[Debasish-]

How will i repair my LG UM 7780PTA UHD 43 inch TV have same problem of Horizontal line In down side of Display

[OliveElektroTeknik]

the title should be changed to how to replace the t-con board on a lg led tv. good work👍

[slemmon]

Tampatec you are the BEST. Great info and instructions!