The 690's DVI-D port is plugged into my Samsung SA700D. When I power on my PC, the monitor goes to sleep right after the windows splash has loaded. (No blue Windows screen) I'm not even sure that it goes to sleep. When I switch from HDMI to DVI the display shows nothing. I have to remove the cable from the 690 and plug it back in, and that sometimes doesn't even work. Does anyone else have this problem? Is there an easy fix?