Hi all. I've got a mac pro with an X1900XT video card with dual DVI outputs. I've got a 23" ACD as my main display and I sometimes connect my TV via composite (using the Apple DVi to video adapter). When I'm not using my TV with my Mac, I unplug the adapter. Everything was working fine up, but now my Mac doesn't seem to detect the second display. When I connect the DVI plug into the computer, my main dispplay goes blue for a second (as it usually does, i think), but then nothing happens. Can anybody help?