Recently the picture has developed a 4" dia light purple color in the center of screen during all shows/movies/pictures. Most noticable with gray/light backgrounds. Is the lamp going bad or something else? My tv is a sony grand wega kdf-60xbr950
It most likely is the optical block that needs to be replaced. Sony knows that these tvs are having a problem with this so it is possibly covered by them depending on how new it is and whether they say that this is a known problem for this specific tv. I would first give Sony a call at 800-488-7669 to discuss this issue and see if they will fix it for free otherwise replacing the optical block yourself is the best solution and you can order the part from Sony too through that number.
Let me know if you have any further questions and I would be glad to help.
good luck with this
Apparently this is a manufacturing defect and Sony is offering extended warranties in some cases.
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Is very likely that the lamp will need to be replace soon.
Is some cases those spots might be generated in the inner part of the lamp.
You can find the lamp for your TV here.
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