Samsung LE46M86BD moving bar errors for some Minutes

[GrafZahl]

Hello everyone!
Our Samsung LE46M86BD TV shows some moving bars after turning on (no matter if it is connected to any device or not).
After 10-20 Minutes the picture is perfect.
Sometimes the picture is perfect after turning the tv on and the stripes wait for 3 Minutes or so to appear.

I made a video of the problem
http://www.youtube.com/watch?v=7sKOO...ature=youtu.be

We changed the t-con board, but this did not really help.
Anyway it was a used t-con board, so maybe it just happens to have the same fault.
The stripes are also somewhat irregular and moving.

Does anyone have an idea? This would be highly appreciated, of course.

With best regards

GrafZahl

[tom66]

Re: Samsung LE46M86BD moving bar errors for some Minutes

That looks like a tab bond fault to me.

[GrafZahl]

Re: Samsung LE46M86BD moving bar errors for some Minutes

I have done a little bit of research about "tab bond" failure and tried to apply some preasure when the problem shows up.
It seems you are right, as this fixes the problem for a short time.

Could this be some kind of cold solder joint problem on the ribbon cables?
Any chance to improve the situation with a heatgun?

[tom66]

Re: Samsung LE46M86BD moving bar errors for some Minutes

Typically, the problem is fixed by applying a "shim" to the bond, which presses the bond in place. Bicycle innertube, thermal material (such as also used on t-con boards), and sticky tape with foam can all work well for this.

[GrafZahl]

Re: Samsung LE46M86BD moving bar errors for some Minutes

We did as you proposed and it seems as if it has fixed the problem. At least for now.

Thank you very much!

[maury-79]

Re: Samsung LE46M86BD moving bar errors for some Minutes

hello,
I have the same problem on samsung le46-m86bd,
with the touch of above-left angle you can see fine ... but then sometimes back again, sometimes you can clearly see for hours ...
as you have solved the problem?
thanks your help