I just replaced my motherboard with a new Asus z97-ar and bought a new 4690k cpu to accompany it. System will start but no feed to the monitor. I have a Kingwin ABT 750mm psu. I've tried removing and resetting the cpu. I've tried removing and replacing the gpu. Unplugging and re plugging the 24pin and 8 pin(two 4 pins) from the motherboard. I've even swapped monitors.