I have a 1.83GHz core 2 duo mini from 2008. I have it hooked up to a Samsung DVI monitor. Lately, the display has been going off for a second, then coming back on. I checked all the connections, they are fine, but every now and then it happens again. I'm not sure if it's the monitor or the mini. Short of hooking up another monitor, is there any way to test or figure out the culprit?