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Thats caused by a bad optical block. The cost of that repair will almost always be greater than replacing the TV.Thats a very common issue with alot of Sony DLP models which suffered that optical block issue with the blobs of color usually blue or green
It may be the optical light engine---usually the whole screen will not be a uniform blue but just areas----the lamp shines into the engine and the first part it hits is the blue---some damage can happen since the lamp can burn that area with its heat---best way to look is go to a unused video input and look there.
You have a bad Opitical Engine. It is costly, so call Factory they give you some concession on the part. Make sure you have all the information about the TV like Model Number etc.
Cost of about $900.00 and up.
Hi, This blue dot and hue problem is due to bad lcd in your tv as its Sony dlp tv that has optics block, that is also called light engine, it consists of 3 lcds, filters and lamp to produce an image that projects on front screen. In this tv, blue lcd became defective and complete light engine will be replaced to get it fixed. As other expert talking about blue CRT (cathode ray tube) that does not exist in this tv and my fellow expert has no idea about this kind of tv, sorry for that. Hope this info will help you, let me know if you have additional question. Thanks.
You will need to pull out the engine and check for any smudge on the lens. then proceed with the polarizers 3 of them they are sitting in front of the DLP chips, this is a delicates operation. the blue polarizer is the one which usually suffers burn-in (dark spots on the glass). if everything looks ok, then it means that the dlp chips are faulty, at that stage it will be uneconomical to be fixed.