I have two Powerlite S4's, both with the same problem. They are roughly 1 year old, and the problem occured a short time after replacing the lamps. It wasn't caused by the process of replacing the lamps.

I have a large area in the middle of the projected image that has no blue. The shape is roughly the shape of the lens and takes up most of the image area, about one-half to two-thirds. Outside this area the picture is good, inside it is missing the color blue and has a blue outline around the perimeter of this area. It's not out of focus or distorted within the affected area.

I have tried to find some info on this condition, and the only thing I come across is that on these models, the blue filter can become damaged by the lamp. This sounds like a possibility but now I need to fix it, or whatever the problem is. I am an electronics technician so this is within my capabilities, only I have no info on this fault.

Any information, part numbers, or links to applicable information would be appreciated.

Okay, now what might seem like an elementary question. Are the polarizers the same on each of the three colors, or do they have to do with generating the color itself?

I do repair / modifications on LCD monitors and I have many spare polarizer sheets about. Could something like this be used to replace the burned one, or does it require some sort of high temperature material?

For one thing, the post you replied is 2 years old. Second, you didn't tell us what projector you have. Blue Blotches could be burned polarizers (only possible with an LCD unit) or a lot of dust on the optics internally. More information from you would be helpful.

And there is no way the lamp will cause any image anomalies. The only effect you will see from a bad lamp is OVERALL reduced brightness/contrast. No color issues.

Quote (Blue Blotches on Feb 4, 2010 8:22:15 PM): Hey Jollytim I'm also a Tech. and like a dumbass I let the "Replace Blub" massage go on for abit until "POP".... Now I changed the Lamp and I have blue Blotches on the screen, it seems to look like a crack glass,gun or polarizer. Somthing just aint right. took it apart and didn't see anyting that looked wrong. It's not out of focus or distorted within the affected area as well. any Ideas with out saying I screwed up. LOL Thanks Rudy O.