I'm using an Eizo CE210W monitor on an early 2008 MacPro. Just this week, the monitor started acting up - it goes blank (dark - but not quite black) for a second and then comes on again. But it seems now that as the day goes on, it becomes more frequent and sometimes stays blank for several seconds. The connections are all solid (the older connections that actually screw into place) and nothing else about the system has changed. At first I thought it was Capture One Pro software that was doing it, but it happens on other apps as well.
Any ideas of what might be wrong?