Samsung PN50C550G1F black horizontal lines

[husky601]

Re: Samsung PN50C550G1F black horizontal lines

Another PN50C550G1F on the list!!

[Flyboy_vern]

Re: Samsung PN50C550G1F black horizontal lines

Well I have the same problem symptom, thin black horizontal lines, same model, bought at COSTCO, manufactured in November 2010. I have read many, many similar posts , there appears no success with board replacement of ribbon connections. The nature of the failure rests with internal panel component failure. Especially when several horizontal (pixel) thin black lines are evident and continue to grow in numbers as time goes by. Samsung as a Manufacturer must very well know the nature of the failure and are not admitting or addressing this problem outside of warranty, confirming their poor product quality and customer support.

This is another example of a Manufacturer cost cutting and poor quality control impacting customers who have bought Samsung's products in good faith.

[kam264]

Re: Samsung PN50C550G1F black horizontal lines

I have single black line about 2 inches from the top on a Samsung PN50C550, made 2010. It showed up after about 16,000 panel hours, mounted on a wall. I found a video on youtube (https://www.youtube.com/watch?v=SoZxCu83tV0) that demonstrates what is causing the single line failures - burnt out traces, apparently after the ribbon and under the glass (And here we've been blaming the ribbons!) We can only speculate on the reason... redox? electromigration? silicon nodules from thermal cycling? End of the day, it's an unfixable, slowly dying TV. Of course, I'll still check the y-buffer, but it's highly unlikely to be the cause based on recent feedback.

Personally, it's hard to complain about 16,000 hours, which works out to about 5 cents per hour of use, but for someone used to TVs becoming obsolete before failing, it's still a bit disappointing... especially when there's still a year or two before the 4K OLEDs become affordable (which is what I consider plasma's true replacement).

[kam264]

Re: Samsung PN50C550G1F black horizontal lines

Confirmed that the panel is the cause of my set's black line. Interestingly, the line that failed is *exactly* where the chrome browser bookmark bar ends. We use a HTPC, so the browser window is often up and it goes from almost white to black right where the failure is. Seems an unlikely coincidence.

[Eaglecrest]

Re: Samsung PN50C550G1F black horizontal lines

I have a Samsung PN50C6400 which has at least two line issues (picture attached). There are horizontal black lines of different size (perhaps wider ones are just multiple lines appearing as one) banded across middle of screen (none on top or bottom 20%). These lines started some years back and have slowly increased in number/size. They can be annoying, but i guess i have gotten used to them and often don't even recognize them when watching, but would like to "fix" them if possible.

There are also some vertical, colored lines right of center and near right side. They have appeared after the vertical lines and have not grown to the same extent as the vertical lines.

What are the thoughts about this?