I just installed a new 850w power supply. I am pretty sure that I have plugged in all the right cords because everything on the computer appears to be working, it turns on, all the fans turn, the led's light up, but the monitor will not turn on. I have tried both DVI and VGA and the monitor worked a little while ago before I changed the power supply, so I know it is not busted. The mother board I have is a gigabyte GA-H67MA-USB3-B3. I'm not sure what the problem is, possibly I have missed a connection and something is not getting power and thus the monitor is not noticing anything because it just remains in power saving mode. Any help is appreciated, thanks.