On my '06 Sony KDS-R60XBR1 I have already had one optical block replacement, at sony expense, due to yellow stain in lower right of screen. Now, about 10 months after that replacement, I have a large black stain in the lower left of my screen. I can't find any mention of black stains, just yellow, purple, green or blue. Is a black stain likely to also be optical block problem? Or, if not, what?
sony optical block problems
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Probably another engine. If you don't think you should pay for it you will need to go through the same process again - Sony authorized service center inspection and estimate, phone calls to Sony customer service.