Power blinking/pulsating at startup

[TinoXtreme]

I recently bought a new PC exept my old Seagate HDD and a Corsair CX600W PSU. Before the upgrade, I had a an ASUS P8B75-M LE mobo, i5 3330 and an HD7770 and everything worked just fine.

 

The problem started when I changed my platform to an i5 4690K and an ASRock Z97m Pro 4.

 

Here's the problem: Every second time I start my PC (on average) it won't boot up. The power LED indicator and the lights in the case start flashing. I'm guessing that the power delivery isn't constant becasue you can also hear the PC starting up parallel with the lights flashing.

 

I would record the startup but you can't see anything - I'm guessing it's because it flashes more rapidly then the shutter on my phone camera.

 

I repeat - every second time I start my PC (on average) this happenes. Then I have to unplug it from the wall, put the chord back in, press the power button and it works normally.

 

What's the problem? It it maybe the PSU?

 

Thanks.

[Paul_VB]

are there any dip switches on the mobo? i know my older asus p8z68v-lx sometimes doesn't boot on the first push of the power button unless the EPU switch is disengaged. 

[TinoXtreme]

are there any dip switches on the mobo? i know my older asus p8z68v-lx sometimes doesn't boot on the first push of the power button unless the EPU switch is disengaged. 

Guess not...