When I boot up, the monitor is fine during POST, but as soon as the windows boot screen comes up, the monitor goes black. The green power light stays the same too. While in Windows, I would turn the power off and then turn the monitor power on and the screen will be fine for a second or two, but then go back to black. I did get to try the monitor on a seperate tower and it does the same thing. Anyone have any suggestions? Is the monitor no good? As quick as I could withe the screen, I've checked the settings and everything is set up the way its suppose to be, but I can't seem to figure it out. I thought it might be the cable, but then why would everything be fine during POST?