I have a DVI to S-Video adapter hooked up to my PowerMac G5. I have previously used the adapter to hook up my TV as a second monitor, but unhooked my computer and when i hooked it back up, it stopped detecting the second display. I have tried switching around the monitors, with no luck. When i plug in the s-video adapter, the lcd screen(my original monitor) refreshes, but it still wont detect the second display. So frustrating...please help!