Hi. I have a GeForce 8400GS with a dvi and a vga port, and I hook the dvi to the monitor and the vga to my tv and have dual monitor. About a week ago, for some reason, the monitors would not come "on" for 45 minutes to 2+ hours. They would come on, but it seemed like they had to "warm up".

So I purchased another video card thinking that would solve the problem, but it didnt. Even when I set the monitor to never shut off, after a few hours it will slip back into this problem.

Any ideas? Thank you!