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Horrible color banding on LNT4061F

Hi,

I've had the LNT4061F LCD for about 6 months now, and ever since I got it there has been very noticeable color banding on color gradients (ie: blue skies, gray gradients such as those on the PS3 menus, dark scenes in video games, etc.). This has been very prominent on both my PS3 (connected with HDMI) and my D-Link DSM520 media receiver (connected with component video). To test I made a blue to black gradient in photoshop and displayed it on both units, and both are horrible. I would have returned the TV, but I didn't notice the issue until I hooked up my PS3 and that was after the return period.

I contacted Samsung support, and they recommended I get the TV serviced. However, I had read that this panel is 8-bit, as opposed to the LNT4065 which is 10-bit. Does this mean that the color banding is just a side effect of the lower color processing? Or is there something wrong with my particular panel? Any help would be appreciated! I don't want to get this thing serviced for a problem that may be inherent to the model in the first place.

Here are some pictures I took of the issue...
http://img20.imageshack.us/img20/4327/dsc01712yg3.jpg
http://img20.imageshack.us/img20/8676/dsc01713pp8.jpg
http://img527.imageshack.us/img527/5188/dsc01711lu1.jpg

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Has it been calibrated.

In reply to: Horrible color banding on LNT4061F

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Problem is now visible through Wiselink as well

In reply to: Has it been calibrated.

Thanks for the quick response, I have done some light calibration, but if you're asking if it was professionally calibrated, no I haven't. However, I don't see how calibration can improve color processing, all it would do is give me a more accurate picture, not better bit-depth. I've tried a new test, and have displayed a red gradient on the TV from the PS3, the d-Link and the TV's own wiselink through direct USB. All of the inputs have major color stepping.

Here's the original image (which displays fine on my 6-bit LCD computer monitor)

http://www.digix.imagica.co.jp/support/cine-tal/download/Stills/8bit_full_grad_1red.png

And here it is on the TV (this is the left side of the screen where the banding is most prominent)

http://i35.tinypic.com/3094ju1.jpg


So it's pretty bad any way I try it. But if I get a Samsung tech out here will he be able to determine if it's the TV itself and not the other devices? Just wondering if they bring their own means of displaying test patterns and such.


By the way, the 8 bit cube you pointed me to displayed fine for the most part, but an 8-bit full screen gradient definitely has some color stepping.

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"an 8-bit full screen gradient definitely has some color ste

In reply to: Problem is now visible through Wiselink as well

"an 8-bit full screen gradient definitely has some color stepping."

Then you are answering your own query at that point. I'd look more at black crush (what a term?) since I've seen that effect and it makes the issue worse.

Let me be clear here. I didn't write it could be fixed (you know why) but that calibrations and settings can reduce it.
Bob

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