I have a computer with an Asus Z87M / G30AB rev.1.01 motherboard. I7-4770k processor. I can no longer start the computer. So I proceeded to replace the PSU but nothing works yet. On the motherboard, the green LED light indicates that there is power. I also replaced the CMOS battery because it was dead. I cleared CMOS with the jumper but nothing works yet. When I press the Power button, power led is ON on the front of the case, but the light goes out after a few seconds. No fans can operate. What should I check to bring this motherboard back to life? There is nothing apparent on the motherboard that indicates it is dead.