So I just upgraded to a GTX 750 Ti and a new Corsair CX750M but now I get nothing to my Monitor at all, Only connector I believe I did not plug in was a "P7" Which I read was for a Floppy drive? Which I do not need. My GPU , CPU. And PSU fan all are running and I can hear my HDD kick in when I turn the PC on. But I get nothing to my Monitor. Any ideas would be helpful.