My Sony Grand WEGA LCD Projection TV is one of many Sony TVs with defective optical blocks. This is the main projection component costing over $1,000 to replace.

Sony issued a service bulletin acknowledging they made some defective TVs with this problem. But they are refusing to stand behind the product. Many of these defective TVs only last 1 to 3 years.
It appears there are so many bad ones, that Sony can't get replacement parts quick enough. We have been waiting 2 months and still no scheduled delivery date.
To add to the insult, Sony pays to repair some of these out-of-warranty TVs but refuses to pay for others when they all are in the same age range and have the same defective part!
Google "Sony TV Problems" as I did and you will find how widespread the problems are.