New build with i5 3550, Asus P8b75-m/csm MB, Corsair 8GB Ram, Antec 430W pwr supply, Kingston HyperX 3k 120GB SSD, WD Caviar Green 1TB, LG DVD R/W. Assembled system and powered on, but power to HDD, fans, DVD, etc.. only briefly came on. Power LED on MB remains on, but peripherals do not power up.