I just built a new PC earlier today. The parts are a z97 gaming 5 motherboard, i5-4460, seagate 1tb HHD, Corsair Carbide spec alpha, EVGA 500w psu, 8x2 gb Gskill ram, and a GTX 960 4g. The PC originally wouldn't start, instead a blue LED light would flash on the mobo. I took apart the entire PC, and put it back together, at which point it started working. About 3 hours later I was setting everything up and trying to install windows 8.1, but it wouldn't work because it couldnt recognize the hard drive. I shut off the PC, unplugged and replugged in the hard drive, and then the PC just wouldn't turn on, all that would happen was a blue flashing light on the mobo again. I just finished taking apart and putting back together the PC once again, and still it doesn't work, all that happens is a blue light on the mobo, the fans don't turn on, nothing. Any ideas on what could be wrong/ a fix for it?