Hi, I have a Sony VPL-FHZ65 projector and it has developed a spot, I can't quite tell if it's a dark spot or just distorted, either way, it seems to appear only on the Blue color. If I put solid red or green image on the screen I don't see any issues but when I put up Blue then I see it. I understand it's a 3LCD projector using laser source for light. Wondering what's causing this issue - is it the Blue LCD gone bad or phosphor wheel or polarize glass? Any insight would be greatly appreciated. Cheers!