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Is this severe retention or uneven phosphor age?

post #1 of 11
Thread Starter 
I have a 6 month old 9G Kuro which appears to have developed some screen burn from the on screen display of my Onkyo 876 amp. When muted, the Onkyo OSD displays 'Muting' in bright white letters in the bottom corner of the screen. It has never been abused and left for hours on end, and i never saw any retention in the first few months so didn't think about deactivating the OSD. The display didn't seem to have an issue with it.
Now however if i display a very bright white screen, i can clearly see 'Muting' in a feint grey color(like a shadow) as if the display has faded where those letters have been displayed. What is odd though, is if i bring up one of the grey onscreen menus of the kuro(such as the AV selection menu) so that the menu is nearby but not covering the shadow, then the shadow disappears even though the screen brightness remains the same. What is causing this effect?
I have tried running full screen 100IRE windows and white noise for over a week but the shadow hasn't faded.
Thanks for any help
post #2 of 11
if there is a shadow on pure white content and you can see what it says, and it's not going away after feeding it slideshow colors/ running video pattern, then yes, that is burn in.
post #3 of 11
Thread Starter 
Quote:
Originally Posted by pdogg93 View Post

if there is a shadow on pure white content and you can see what it says, and it's not going away after feeding it slideshow colors/ running video pattern, then yes, that is burn in.

Bummer. Just as i'd feared. Shows these 9G Pioneers aren't so bullet proof.
What i find strange is that if i have a darker window onscreen(such as a menu window) up to six inches away, then the shadow disappears completely. It is just pure white like the rest of the screen.
What causes that to happen?
post #4 of 11
Quote:
Originally Posted by kwangomango View Post

Bummer. Just as i'd feared. Shows these 9G Pioneers aren't so bullet proof.
What i find strange is that if i have a darker window onscreen(such as a menu window) up to six inches away, then the shadow disappears completely. It is just pure white like the rest of the screen.
What causes that to happen?

Well, I'd give it another week or so. Use the features on the TV to clear it up regularly. If it's not helping after another week then it's probably burn-in.
post #5 of 11
I would put the sleep timer on/no signal just in case too. But yea give it more time, maybe watch full screen animated movies on loop. Perhaps all the color action in the background might alieviate this problem
post #6 of 11
Thread Starter 
Thanks guys.
I have had the set on almost 24 hrs a day for the last week, alternating white noise with a color screen slide show overnight. It doesn't appear to have faded.
I don't think it has helped that the text sits in the black bar area of 2.35:1 movies. I presume white text on a black background is worse than if there was a moving image underneath.
I am hoping that i can forget about it or that it fades over time!
There is a comment here that says the time it will take to fade is 4 times the total duration it has appeared onscreen. Not sure if that is true!
post #7 of 11
I'd say that sounds about right. When i had my panasonic 800u I played a video game for about 3 hours straight and it had imprinted a gauge in the bottom right of the screen. It took about 2 days of straight break-in images to get rid of it.

So depending how long that icon was displayed for, it may take a little more time. Good luck.
post #8 of 11
Quote:
Originally Posted by kwangomango View Post

What i find strange is that if i have a darker window onscreen(such as a menu window) up to six inches away, then the shadow disappears completely. It is just pure white like the rest of the screen.
What causes that to happen?

Fortunately, this suggests that your phosphors are just fine. I have seen a very similar phenomenon on my 9G when I purposely tried to induce IR to test some theories of mine. The IR image would instantly disappear and then reappear depending on the content adjacent to it.

I speculate that it has something to do with the proprietary KURO driving system that uses a combination of space discharge and surface discharge depending on the content to be displayed. Both mechanisms can induce IR and I suspect they can be separate to one another. In other words, the IR created by space discharge will only be seen when space discharge is used.

In your case it seems the IR is very strong and long lasting and only isolated to one type of discharge (space or surface)

This is only speculation though.

Does the "muted" logo appear on all break in slides (color slides)? Even the black slide?
post #9 of 11
I wouldn't use solid color slides, that wouldn't seem to do anything since it will age the entire screen the same amount.

You want to be displaying random video as much as possible.

I wouldn't lose too much sleep. I believe that it will disappear slowly over time if you turn off the OSD.
post #10 of 11
Thread Starter 
Quote:
Originally Posted by xrox View Post

Does the "muted" logo appear on all break in slides (color slides)? Even the black slide?

It is most obvious on near white and 10-20 IRE screens. In a dark room with my nose up against the screen i can it through a 0 IRE window - the retention appears blacker.
It is much less visible through bright red, blue or green windows.
I have turned off the OSD but it hasn't faded at all in a week.
I'll give it time.

Thanks for the help guys.
post #11 of 11
it takes time...its not burn in. The same with tv menu or volume ...it cant burn in that fast unless you forgot the OSD longer than 24 hours, but if it was on and off you should be okay. My panny was showing IR in my first 1000 hours even if i used the menu but now after 2000 hours i dont have problems at all. IR its past
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