So I built a PC with all new parts and when I finished plugging in all the cords I plugged the psu power cord into the wall, turned on the psu and pushed the power button on the case, a red light flashes once near the gpu on the mobo and then nothing happens. All hardware is new. MSI 970 mobo, MSI 750TI gpu, corsair vengeance ram, amd fx cpu, cx430 psu. Does anyone know how to fix it? Thanks