Sony KDS-50A2000 screen is in green tint

My Sony KDS 50 A2000 is 17 months old. Its the 50 Inch SXRD projection model. About two weeks ago the screen developed a green tint with cannot be tuned out, then a few days later the message began to appear on the screen that the bulb was nearing the end of its life and must be replaced.
Fortunately I have the Circuit City extended warranty.
I called and within just a few days a serviceman came out and replaced the projection bulb.
The Result: No change in the picture, the green tint remains on all channels, so I'm awating the next service call. Under the service warranty they have the option to repair or replace this set. If indeed this is the light engine (optical block) which I suspect and its going to cost $1,000 or more I may be looking at a new set.
When it works this is a great TV, but I have had three Sonys now including two other standard CRT models and now this one joins them in the junk heap, the other two also bit the dust after just about two years. Is it time to give up on Sony?
I know they have a class action suit on a similar model for this same problem. Caveat emptor

They just looked at mine 10 minutes ago it is the OB (optical block) I got a quote of $1000 to fix it I'm calling Sony right now, my TV is less than 2 Years old