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T-con board or panel problems? Colored Vertical Lines displayed

UN55KS8000F

Hi everyone,

I am normally the guy that does some light soldering work, phone and tablet screen replacements and some PC troubleshooting. However, I have never dug into TV repair and I don’t even know where to begin with this problem. I have this Samsung TV (Actual model is UN55KS8000F but there was no option for it) that was working perfectly about a week ago, then in the middle of watching a show the display went dim, but the image was still there and playing fine (kind of like when your phone screen darkens before it locks). I thought the auto shut off feature was bugging out so I turned off the TV. When I turned it back on all I got is the backlight with lots of vertical colored lines but no actual images of menus or anything. The lines do change color and intensity when I press menu buttons and the like. Where do I even start with this diagnosis? From what I have read T-con boards can cause display issues, but most examples just show either no image or a snow globe effect on top of whatever content is displayed. I am expecting my first child in May and I would rather keep this running instead of spending $700+ on a new TV. All help is much appreciated!

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Update (02/20/24)

I replaced the board and I still have the vertical lines. My next bet is possibly ribbon cables. Here is what I am seeing.

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@fixedtechrepair your TV 's T-con board is integrated with the main board. I'd give that a try. Should say something like BN94-10961N on your board somewhere. That might even correspond to "the display went dim".Even a used one will work for you right now. Safe your money for more important things :-) Congratulations!

Of course, you also want to check your ribbon cables to make sure that they are not corroded, torns, etc. You can always post some pictures of your boards with your Question. that will enable us to see what you see.

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That’s extremely helpful to know that the T-con is all wrapped into the main board. I’ll go that route and report back if I’ve got any other questions, thank you!

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I don’t suppose you would have any further diagnostic advice? I replaced the board with a known good board and I am still stuck with the same colored streaks. Are the ribbon cables potentially bad? That’s where I am thinking to look next.

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@fixedtechrepair could be the cable but usually they have a bend like that form the factory. Try one more board, the main board. Even a used one will work or if you can find a seller that has no _questions asked return policy. Give it a try and see what happens.

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