Samsung QN75Q90TAF (Q90T) with single vertical line and horizontal lines bottom of screen

[Chris24]

Have a Samsung Q90T that has a single thin vertical line on left side. (See pictures)

When I apply light pressure at the bottom of screen along line, more vertical lines appear then disappear.

Also along the bottom of screen is about an inch of horizontal lines.

Before I tear it apart, and start inspecting driver boards, tab bonds and the Tcon, first wanted to see what the community thinks. Is it a shorted led and thus a bad panel anyways?

The picture is amazing otherwise.

[Chris24]

Would a single black line be a bad pixel or potentially something else?

[Davi.p]

Them are not bad pixels, do not ask me how to fix this issue..

[Chris24]

Thanks. If you don’t think it’s a bad LED I’ll put effort into other potential issues as I research, thx

[EazyBone]

Line up and down bad cof connection?

Lines across, bad panel?

I wouldn't waste my time unless for fun. I have seen some videos try and undo a cof tab and solder it back on and it did actually work. Don't think I would be able to accomplish that but Ive considered trying.

Interested if you do manage to accomplish something

[Davi.p]

Detachement of tab pins is only a myth, but the problem is still in the tab, or call it fpc.. i cannot say more ..

[Chris24]

Thanks gents, super helpful. I was going down a rabbit hole on cof and will keep going.

The picture on this tv is great, tempting to leave it, but just as tempting to get it right. Thx