don't know if you can help. I have a boxlight cp-300t 3LCD projector. I can't get it to produce a image from a video source. it knows i got the cable hooked up but it can't display the image from the composite (yellow) RCA cable. Yes the bulb works as when i turn it on it lights and says boxlight on the screen. any ideas. i've been turning on the projector and once its done its 30 second warm up i plug the RCA cable in and would have a image within 5 seconds. now nothing. its started taking longer and a couple try's to get a image and now i get nothing.