I have just built this computer and came across an odd problem. Sometimes when i try to turn on the computer only the lights come on and fans run but my keyboard, mouse and monitor wont come on. I then hold down the power button untill it shuts back off. I then hit the power button and suddenly everything starts normally.
blaming the PSU makes ZERO sense. Currant is based on load. The PSU could only supply the wrong voltage. NOT currant. Need to know the model. but VERY unlikely considering rosewill qualify has gone up and your system load is so low. you need to swap components to diagnose. probably the motherboard. Or bios as said above