Originally Posted by anoob
Have you tried moving your videocard into another PCIE slot? Try that and see if it works. Also try changing your DVI port connection to another one on the videocard, usually the PC uses the upper most DVI. I found this to be sort of a problem on ATI cards. If I use the lower DVI ports I would get "No-Signal" or "Out of Range" displaying on the monitor but it would only happen sometimes. Sometimes it would work with the bottom DVI connection and sometimes it wouldn't. Could also be possible that your monitor has input buttons to change display connections. I know on my monitor I can have 3 different connections, DVI/DVI/VGA and have to press the "Input" button to swap between the 3.
If it was working before and not working now check all your connections again. Reseat everything, sometimes you think you put everything back in it might be that you didn't plug in something tight enough. Check CPU/Ram/Videocard seating and check that all proper cables are plugged in. Also make sure to test your board on something non-conduction like ontop of a cardboard box or something.
Well I moved the bunch downstairs. Now I'm sitting in my kitchen reinstalled the gpu to the 3rd PCI, got a DVI cable instead of my HDMI-to-DVI adapter, been trying both DVI outs on the gpu. Same problem.
There are 2 different scnarios though.
1. When the system fans and gpu fan starts everything is running fine but the dimm light is not lit and there is no response on the monitor. The dimm lights then only flash briefly blue when the system is shut down. By the power button
2. The system is powered up by the power button, blue dim flashes, and all system fans and lights are shut down, then the blue dimm and ASUS logo flash and the system powers down automatically.