Horizontal lines on certain colors on TV

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Toshiba Television

Repair guides and support for your Toshiba TV.

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ElectricShock @electricshock

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发帖于: 2022年11月11日

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Horizontal lines on certain colors on TV

I have a Toshiba 50UL2063DG Android TV, and it was working fine until lines started appearing on the TV, these were basically unnoticeable at first, but a while later, they started getting worse to the point where the lines would start flashing. This covers a large part of the display. Right after turning on, the TV is fine with just a few lines, but after just a few minutes, the lines cover most of the screen and flash. I have done some research and suspect a T-Con board problem, but I'm not sure.

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Electric Shock, it won‘t be the T-con board. Horizontal lines are never caused by the t-con board. They are usually caused by a bad panel LCD driver board and sometimes by a bad main board ( not thin lines like on yours). Let‘s see if we can find out more about your specific TV. Start by checking the ribbon cables for tears and corrosion.

由 oldturkey03 完成的 2022年11月11日

@oldturkey03 Thanks for the quick reply. I have actually been struggling to find much about this specific TV, but anyways I have checked every ribbon cable, between the main board and the T-Con, between the T-Con and the LCD drivers, and between the drivers and the LCD. There are no tears, no corrosion and no damage at all.

由 ElectricShock 完成的 2022年11月11日

@ElectricShock can you post some good pictures of your boards and the interconnect cables, with your QUESTION?

由 oldturkey03 完成的 2022年11月11日

@oldturkey03 I have added some pictures of the boards and cables, if they aren't high enough quality, I can use a better camera.

由 ElectricShock 完成的 2022年11月12日

My Toshiba tv model 50UL2063DB has the same flashing horizontal lines issues after less than two years’ usage. Before then it was working perfectly fine.

由 Michael Trevor 完成的 2023年4月23日

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Electric Shock, it won‘t be the T-con board. Horizontal lines are never caused by the t-con board. They are usually caused by a bad panel LCD driver board and sometimes by a bad main board ( not thin lines like on yours). Let‘s see if we can find out more about your specific TV. Start by checking the ribbon cables for tears and corrosion. — oldturkey03
@oldturkey03 Thanks for the quick reply. I have actually been struggling to find much about this specific TV, but anyways I have checked every ribbon cable, between the main board and the T-Con, between the T-Con and the LCD drivers, and between the drivers and the LCD. There are no tears, no corrosion and no damage at all. — ElectricShock
@ElectricShock can you post some good pictures of your boards and the interconnect cables, with your QUESTION? — oldturkey03
@oldturkey03 I have added some pictures of the boards and cables, if they aren't high enough quality, I can use a better camera. — ElectricShock
My Toshiba tv model 50UL2063DB has the same flashing horizontal lines issues after less than two years’ usage. Before then it was working perfectly fine. — Michael Trevor

oldturkey03 @oldturkey03 声誉积分: 782.4千 1.1千 893 2.3千 · Answer 1 · 2022-11-12T07:43:37-07:00

oldturkey03 @oldturkey03

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@ElectricShock the boards look good and I checked them against some other ones and does not look, like any burned or missing components. The only boards I have nothing on are the LED driver boards. At this time, the only thing I would try is to replace the main board and see if that makes a difference. Get an inexpensive used one to try it out.

The Vestel board is really not the highest quality and all the boards have been used on JVC TV's and other less expensive models. So, anything is possible. For more info on that board, check this Vestel 17mb170

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Ok thanks, I will consider ordering the board. I have taken the old one off and it looks perfect, no burn marks or anything. I'm assuming the GPU or CPU has gotten damaged somehow. Thank you for the answer.

Edit: I have found this board on ebay: https://www.ebay.fr/itm/115313402056

Would you say that's the right one?

由 ElectricShock 完成的 2022年11月14日

Hi OldTurkey03,

I ordered and replaced the main board to the same result, the lines don't reach the end of the screen but still flash.

Is there anything else to be tried or would you call this TV dead?

Thanks

由 ElectricShock 完成的 2022年11月18日

@ElectricShock How adventurous are you? There might be a way of cutting the tabs from the LCD driver board. Let me find out if this will work for that particular panel. Anything after that is really past the abilities of what we can do/offer here since it would/could involve replacing the LCD boards and rebonding the TAB connectors etc.

由 oldturkey03 完成的 2022年11月18日

Hi OldTurkey03,

IFixit never notified me that you answered, so sorry for the very late reply. I'm pretty adventurous seen as the TV is basically dead to me at this point. I could cut the tabs from the LCD driver, but I think it might be difficult to rebond them, wouldn't it?

由 ElectricShock 完成的 2023年4月24日

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Toshiba Television

Horizontal lines on certain colors on TV

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