About 2 months ago I noticed a dark spot on my screen when there was a white background. Over time this has changed to a bluish hazy texture all around the outer edges of the screen all the time. Also I have noticed about 10 small tiny blue dots spread out in the upper right hand corner of the screen. It kind of resemble the milky way galaxy with tiny stars shining through.
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If they look white or like pixels out this model is prone to a bad optical light engine---it is the heart of the set and most expensive part as well--typically it starts with one or two and over time more "appear".
Their is a CRT fluid that keeps the three lenses cool ontop of the tubes. The fluid goes bad after a few years and causes what you describe.
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!
I would first try a new lamp. If the reflector portion of the lamp has any defects, it could show up this way as the light would not be uniform. The next possibility is a defective light engine. The engine portion if not field repairable and would need to be replaced. Try the lamp first and let us know what happens.
You have possibly contaminated fluid in your blue picture tube if it has a hazy look.Blacks and whites look bluish and whites have a blue bloom to them.The other problem could be bad convergence amps.This would be double image around letters on the screen.
The HD-ila sets accumulate a lot of dust in the light engine. The worst offender is the little fold mirror just under the lens. I take my set apart about every 8 months or so to clean all the dust from the light tunnel and all lenses, mirrors, diffusers etc. The picture really regains it's pop when this is done. Unless you are a skilled technician though, I would recommend against attemptimg this procedure as you need to disconnect the individual color lcds. Check with a local service center to get it properly cleaned.
The gray spots are caused by dust on your lens, very easy to clean.
Power down the TV.
If you open the right side access panel (right side as you are looking at the front of the TV) you can see it in the middle, it's not very big. Using a scratch/lint free cloth, gently wipe off the lens or use a vacuum to **** up the dust being careful not to actually touch the lens.
Replace the access panel and enjoy your spot free screen.