I bought a seasonic 860 plat, and installed it. Cpu connectors is a 4×2. 20 +4 is installed correctly, With both pins inserted in the psu mb slots.additionally there is a sata connected. The computer turns on and for a brief moment it powers the fans and dies down. I installed the old psu and it powered like a charm. But i tried to reinstall the new psu 860. And still it is not working. So i changed the batteries on mb. Still nothing. I need help