I have a problem with my GPU's VGA slot. Whenever the VGA cable is connected to the GPU's VGA slot in my computer, the computer boots on (fans spinning, LED lights, etc) but nothing is displayed on my monitor(no signal). However, when the VGA cable is connected to the motherboard VGA slot, everything is fine, the computer boots on and there is display on the screen. How can I fix this problem? I do not want to use my computer's integrated graphics.