This is a DP 1.25 GHz G4 with the dual drive doors. According to the manual and everything I've read, it is supposed to be able to play out to two displays simultaneously. The video card has both ADC and DVI connectors. I've got a Apple Cinema Display on the ADC port that I've been using for months. On the DVI port, I'm trying to hook up a BenQ video projector to display at the same time. It's not working. On startup, the projector shows the Apple logo and spinning circle. The Apple display doesn't show anything on startup. Eventually, the projector goes to a default screen and says "DVI not supportive" and the Apple display shows the desktop and mouse pointer, but no icons and no way to do anything. It stays this way until I unplug the DVI projector. If I start up with just the projector plugged in, seems to display correctly. But I need both to work at the same time. Sorry..I know it's a long post. Any help is much appreciated.