I have a Optoma HD70 DLP projector with over 1700 hours on the bulb. The picture was getting dim and would kind of flicker between bright and dim. Then after a while I started seeing color cycling, then a whining sound, then a shut off. That I now know to be a color wheel issue. I got a new bulb, and disasebmled the projector and pulled the color wheel out. I had some dust build up and cleaned out the whole projector and the contacts and motor on the color wheel. I put it all back togeather and it worked great! I was able to finish a movie and then went to sleep. Today I got up and watched an episode of ST:TNG and then played a game about an hour on my PS3 with no issues. That was about 2 hours ago. Now I just turned on my projector again and from the moment I turned it on it was changing between bright and dim at a steady pace about once every two seconds right on beat. Then without a whine or color cycle it just shut off and my orange lamp light turned on.
Is this sign that the color wheel is bad and needs to be replaced? I was hoping I got lucky and could get away with cleaning it. I just bout a bulb for $160 only to find out I may need to spend another $160 for the color wheel.
Any help would be great.