Bluish circular area in picture
We have noticed a bluish circular area about 8 inches in diameter in the center of the picture area. It does not overwhelm the color but is noticeable enough that on certain pictures it detracts from the viewing. Also very noticeable if watching old B&W movies. I have just changed the lamp with no positive effect. What are next checks?
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Product Troubleshooting for Televison & Video
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Google the model number with "problems" since this sounds like a damaged Optical Light Engine which has been burnt/damaged by the heat from the lamp and this is a common issue on this and other Sony sets.