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Hisense 55" getting lines after logo

So it started out as horizontal lines across the bottom. I re-connected the 2 ribbons to the T-Con board, and now I get Vertical lines. I tried doing a software update at the recommendation of Hisense support, but no change. When you turn the tv on the logo is perfect, no lines, then within about 10 seconds the vertical lines fade in and stay. Could it still be a Screen issue if the logo appears perfect? I’ve ordered a replacement Tcon board on Ebay and will swap it out, but it seems like it may just be a ribbon issue?

Any thoughts?

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i been fix electronics for 35 years your heading in the right direction with the tcon but you need to resit all the ribbon cables and then there are conductive tabs all around the bezel (frame) that can do this also. be very careful taking the bezel of. i use some very fine sand paper or them green scratcher pads and slightly buff then they are silver in color and all around the frame good luck

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Replaced T-Con board, still getting all White screen with lines, not even getting logo anymore. disconnected every ribbon and cable to every board, then reconnected all. Still nothing. Shouldn’t matter that rear cover is off correct? Seamore mentioned something about back cover having conductors on it? I don’t see anything. and I know I’ve had the cover off when I first had the problem and it didn’t change the picture at all. What started out as a tolerable area of lines at the bottom has not become an unviewable image.

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@jeffbeckib if your logo as well as your onboard menu works and does not show those lines, it is your T-con board that is failing.

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Logo looks fine for the first 8-10 seconds, then the lines go through everything. Including menu.

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the logo is not using very much power and the cabel on that side may be fine and the contacts but with a full picture it is using a lot of power and if it has bad contacts that is cuzzing it to not work right

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So does this still point to the TCon board?

I've been unplugging and re-connecting the ribbons going to the t-con, now I get half white screen and half white with lines.

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@jeffbeckib now this "now I get half white screen and half white with lines." does sound like the T-con board. I'd get one from a place that has a good return policy. Just in case....but it will be a good start. It will either repair your TV or rule out the T-con board as cause.

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I don’t think it’s an issue with the ribbon cable - if it were, you’d see issues with the image any time the screen is displaying (including the logo at boot up), right?

I’d say go with your plan - swap out the Tcon board. also, check the ribbon cable connection at the receptacle on the tcon board - I’ve made the mistake of latching the cable while the pins weren’t aligned or fully inserted into the receptacle. i’m sure you’ve already double checked this :)

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Replaced T-Con board, still getting all White screen with lines. disconnected every ribbon and cable to every board, then reconnected all. Still nothing. Shouldn’t matter that rear cover is off correct? Seamore mentioned something about back cover having conductors on it? I don’t see anything. and I know I’ve had the cover off when I first had the problem and it didn’t change the picture at all. What started out as a tolerable area of lines at the bottom has not become an unviewable image.

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