Originally Posted by mantisboxer
First, I need to give credit to christberg
as they were the first to discover this issue in the last firmware revision. I was not able to duplicate it at the time, but I think I found it.
Here is a description of the issue. When I first turn on my set, black levels are nearly triple normal (0.058 ftL vs. 0.020 ftL). What I am seeing is not the "full screen IR" that has been described by others on Samsung sets. I stumbled into this because my initial readings for black level were just terrible after the set had just been turned on (in Cal-Night). I thought there was something wrong with my settings, so I changed the set to Movie mode and noticed that the screen immediately go tremendously darker. Measured MLL at the expected 0.020 ftL and switched back to Cal-Night. This time the screen stayed dark and measured MLL at 0.020 again.
Intrigued, I just tried switching between all the modes while just visually examining the screen. Every 2 or 3 cycles through all the modes, my Cal-Night 0 IRE window would get much brighter (accompanied by greenish pixel noise)!! Cycling between Movie and and Cal-Night would generally fix the problem, but not always. Sometimes I would have to turn the panel off, turn it back on, and cycle. This would always fix it. I also confirmed christberg's observation that toggling the dynamic contrast setting could also make the problem go away.
On Cal-Day (basically same as Cal-Night, with Cell Light at 17) I could not get rid of the green pixel noise unless I put Gamma from +1 back to 0. Of course this screwed the picture up, so right now, I don't have a valid Cal-Day setting!!
When this problem happens, blacks are truly gray looking. Fortunately, you can work around this, it appears, by simply switching back and forth between modes. The issue will go away until you power cycle the panel. I would appreciate it if others could try to confirm this phenomenon.
You may not notice it when you turn your panel on for the first time, but the difference in blacks after switching modes is dramatic. If there are enough observations, I say we bombard Samsung with complaints.
I think the big questions is, WTF?!? I am beginning to think that the anecdotal observations of sub par black levels may be related to what I am describing here. I think this is clearly an issue with the software and would not be surprised if further improvements to black levels are on the way.
I believe the firmware on these sets is jacked up. I can actually reproduce the issue with ease by turning up the brightness (see below).Issue:
Blacks have green and blue pixel noise. This affects black level and overall picture quality.How I discovered the issue
I was watching Star Trek (2009) blu-ray and noticed that the black bars looked GREY. I was like WTF! So I tried changing the settings, turning the television on and off. And no avail, the overall PQ was terrible. I got up close to the television and looked at the black bars playing on the movie. They had green and blue pixels dancing in the black. I tried to take video but it didn't turn out.How to reproduce the issue:Option 1
Put in any 2.35:1 blu-ray. Set picture to Standard with default settings. Turn up brightness to 57 or higher. You will then see the issue. Also it will not show up on really bright scenes. I was watching 5th Element and some brighter scenes didn't reproduce the issue.Option 2:
Put in a test disk with a 0 IRE pattern up. Set picture to Standard with default settings. Turn up brightness to 57 or higher.How to fix the issue:
Lower brightness to a level that is not acceptable for an accurate picture.
MantisBoxer suggests that turning off the set and or switching through the different modes also fixes the issue but I am not able to correct the issue.
I am starting to lose faith in this television due to this issue, the fact my set buzzes and I am also experiencing some SERIOUS line bleed as well (I spoke to soon regarding this topic earlier.)Can someone else please try to reproduce this issue? I want to find out if I am the only one?