I am having problems with my Optoma EzPro 710 DLP projector. It runs fine for about half an hour but then the image starts to flicker in different colours until it goes black(or as near black as it can go)and white. When I turn it off and back on again as soon as possible it does it after a few minutes. But when I leave it to cool down and try it again it takes halfan hour until it does it again. So I am guessing it must be something to do with it malfunctioning when it gets ho. Does anyone have any knowledge on this matter?