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24.61.59.31
I just got a Panasonic 42 inch 700u.
I've been breaking it in (10 hrs so far) using the HD Theatre channel. They kindly don't leave a logo anywhere on the screen for too long. The set looks brilliant, even with everything at 0. It even looks better than my HD CRT it replaced.
However, on some channels and on some content, such as lower quality commercial spots shown on HD but still filling the whole screen, the two left corners or just the top corner of the screen will become discoloured as if I had a strong magnet on that side of the set. I only happens during poor video quality content or strong video signals. It does not happen on programming created originally in HD.
I would think that if my speakers are causing magnetic problems on the screen, it would happen during all content. I would also think that it would happen on the right side as well, as that speaker is even slightly closer than the left one due to the room layout. They did not cause a problem with my CRT at the same distance.
I also noticed, watching Smart Travels on my PBS station in high def (we get that in the Boston area), that each time the scene changed the blue discoloration would appear in both left corners for a second or two but would go away - as if they panel were actively corrected for magnetic issues.
help? I can't move my speakers any further away and I don't even know if that's the problem? Why does it not happen in TRUE HD content but only to upsampled or low-def?
Follow Ups:
I have not noticed the problem recently. Perhaps it was break-in related? On a related note, it's good that I can reposition my speakers a little closer to the panel.
There's no magnetism problems with plasmas.
Comcast. Charter services this area, so it's only one step on the rung higher than the bottom compared to your area.
The Jensen thingy is probably a transformer (they're used to break ground loops). Ground loops usually appear as rolling lines and/or picture distortions. Do you have rolling lines/distortions or just a crappy signal? If it's just a crappy signal, you may need a signal booster, not a transformer (or you may need both, depending). If you don't use it, do you still see the left corner problems? If not, it's the transformer.
If that's not it, turn everything off and unplug all connections. Begin replugging the connections that you use to view your television signal, then stop. Turn on the plasma and cable box to see if you're still seeing the problem. If you still have the problem, it's either a tuner/processor problem with the plasma, a signal booster problem (see above) or potentially there's trouble with the left side of the plasma grid, which means you either have to get it repaired or return it. If the problem is gone, good. Begin plugging in other items and see if the problem returns. If it does, there's your answer.
Hope that helps.
...is that it only happens with screens that have been "upconverted" to HD. HD channels showing HD content to not exhibit this problem. But, when watching something..especially something brighter, in SD or SD on an HD channel but reformulated to fill 16:9 it happens..more on the upper left but sometimes in both the top and bottom corners.. and even though it is not affected by magnets that is exactly how it appears.. that sort of distortion.
I could be perfect content if everything was originally in HD.
.....Plasma TVs are NOT affected by magnets. So you don’t need to move or adjust your speakers.
However, I can’t shed any light on the problem you describe.
Try Pinging inmate Joe Murphy Jr on this board - he may be able to help you.
Good luck.
Smile
Sox
...where there's a thread dedicated to your Panny model (and similar ones). (Click link below.) Warning--there are over 7700 posts in that thread (!) so you might want to search it first.
Russell
One nice person thought I was talking about a different issue entirely, but at least responded. Everyone else ignored me and continued to argue about black level settings and this other person who can't comprehend the aspect ratio difference between 4:3 and 16:9.
Can you recommend any other forums? :) I like this one because people are also audio geeks, like me.
hometheaterforum.com
I agree you should start your own thread on either forum with a subject like "bizarre panny problem" os something like ;-)
It's just too hard to get anyone's attention on those megathreads.
Just another option. There are numerous calibrators that hang out there and I'm sure they've seen a multitude of problems that affect displays.
Well, that's a bit unfortunate, but sometimes you have to be persistent there, as there are many, many people asking many, many questions. You could also try posting your own thread on this topic in the plasma section, in the non-sticky area and see what happens. I know what you mean about audio geeks ;-), but there are a lot of real video geeks at AVS.
Russell
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