I bought the TV in Feb of 2005 - I started to notice this grey cloud creeping across the TV around Feb of 2007. It started on the right and is now almost all the way across the TV. I called Panasonic 877-958-4372 and asked if this was a known defect. Though they were courteous I was kinda shocked when they said "you are the 1st to mention this .. it is expected that with all the sets manufactured there will be a few that will have defects". I understand the reality of that statement but to have them simply pass it off as "oh well that happens" was kinda surprising. With costs being low compared to 2005 I am simply going to purchase a TV other than Panasonic and put this one to the curb...
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Plasma screens are extremely susceptible to getting broken from any impacts to the face of the screen. What you are describing sound very much like distorted or dead pixels. It may not be a fixable issue, you may have to replace the entire unit or live with the purple bar. The reason you don't notice it as much when the screen is dark is because purple is on the darker end of the spectrum, and will be most visible in contrast to lighter ad brighter colors.
Hi if your tv is a dlp it might be an issue with the DMD board Hi,Yes your problem sounds like the DMD board.This is how it works: http://electronics.howstuffworks.com/dlp1.htm Basically the light of the lamp goes through a tunnel that carries a color wheel(rotating disc with a gamma of colors that creates the colors on your tv)then the light of the lamp goes through the DMD board which is a chip composed of around 2 million pixels that creates the images and colors.When it starts to fail it will create black bars,pixelation,color distortion or white dots on screens. Here's a video that will help you find where the DMd chip is located : http://www.youtube.com/watch?v=0jr_9A5Xd2Q Have a blessed one!
This sounds like a diffuser problem. Basically the LCD Panel is defective.
32" LCD TV use about 8 horizontally mounted flourescent bulbs. They use a plastic material that diffuses (spreads) the light from each bulb evenly on the screen. If this Diffusion Material becomes wrinkled it will leave a grey cloudy look on the screen.
It is possible that the LCD Panel Glass is defective buy honestly I would guess the diffuser.
This isn't cheaply repairable and it is better to replace the TV unless you are experinced with Electronics repair. There may be a possibility to pull this material out and replace it with something readily available from Home Depot but I have not tried this before. It is possible to pull this from another LCD TV.
I bought one built in Feb 2005, installed July 2005. Magnetron tube failed Feb 2007 - cost $127 labor to replace. Just failed again Feb 2008 - will cost roughly $135 to replace this time. Not good for such a high end machine!