Samsung un55d7000 vertical lines

[Shack13]

Hey all, very new to this and have these colored vertical lines across the tv. I started by replacing the t-con board and that fixed it for about a week or two. I've searched youtube and forums, including this one, and articles for help. I cleaned the ribbon connections, baked boards, tapped on everything, moved everything, and even tried messing with the bonding tabs and nothing changes. Hopefully these pics will show what I'm seeing and maybe someone can tell me what is causing a working t-con to fail the same way the last one did or if I'm fighting a losing battle altogether. Thanks!

[Shack13]

Re: Samsung un55d7000 vertical lines

Is this a newer symptom or an older one that I haven't asked the right question for the search to let me know some new avenue to try, inspect, or look? Behind the vertical lines it's such a beautiful picture I really hope I can get something sorted out. Hopefully someone could let me know what I haven't done or done right?

[martino]

Re: Samsung un55d7000 vertical lines

Did you try to freeze the BGA chips on the t-con board?
You can do that by holding a can of air upside down.(like the pc cleaning cans)
Spray in short bursts(you will see them freeze over) onto the 2 big chips in the middle of the t-con board while tv is on and observe picture.
I'm thinking you bought a weak(very weak) t-con board.

[Shack13]

Re: Samsung un55d7000 vertical lines

Ah! No i haven't tried that. First i heard of that actually. So if the picture does change I'll need to find a better t-con? And thanks a lot for the tip!

[martino]

Re: Samsung un55d7000 vertical lines

Often with BGA chips(and this looks like a bga fault to me)when you freeze them you get a different result,telling you your on the right track.If that doesnt help can also try to heat it up with a hair dryer,should get worse then.But I always freeze first,quickest and most reliable results.
btw,if with freezing t-con nothing changes,maybe look at mainboard and freeze any large chips.

[Shack13]

Re: Samsung un55d7000 vertical lines

I was wondering if the mainboard might be a culprit since a new tcon only fixed it for a week or two and resulted in the same fault. I'll pick up a can of aie tomorrow and see what happens. Thanks again!

[martino]

Re: Samsung un55d7000 vertical lines

Often a certain model has a certain common fault. Hence why I'm thinking you bought a weak t-con board.
Chances are the person stripped the tv cause he found it with a cracked screen,but in reality the original owner smashed the screen cause he was pissed that his expensive tv had died.Then dumped it or sold it,next guy finds it,assumes parts are good and sells all boards.
Just a scenario

[Shack13]

Re: Samsung un55d7000 vertical lines

Ha! I get ya. Parts for this model are scarce and i assumed it was due to being a quality product, but maybe it's just a faulty POS