Instruct: Classify the given review as either positive or negative.
Query: Optical Block Problem

After about 4 years now I have replaced the most expensive bulb in the world twice now. Not what I expected. Now this TV has an Optical Block probelm which means that I see a Blue Splat on the bottom right hand corner and also many tiny blue dots all over the screen. Sony acknowledges this defect and has offered to fix it or have me pick from a select list of TV's for a large discount. So be sure to call them if you have this problem.