Optoma HD65 DLP Projector "color black picture 10" Questions

...black and white after around 10 minutes. all the while it is full of white specs allover which seem t increase as time goes by. if it is the color wheel issue, you can replace it, i have this acer ...

...color (just black and white). This will last for about 10 to 20 secs then the projector will shut off. If you have a clear picture then it could be your lamp. Need more info. Does the projector shut ...