Hi ive bout a coolmaster haf case which looks amazing, if installed all the motherboards power supply,hardrive and the usual stuff.I turn the power on and a green light appears on my motherboard but thats it i try to power up nothing happens.Non of the fans boot up either PPPPLLLLLSSSSSSSSS HELP
More about :haf case installed wont start power button moth
Sounds to me your case to power button cable connection is incorrectly seated. Double check the mobo manual and ensure you have placed the pin connector exactly where it should be.
If it is and still not working, try connecting the reset wire onto the power pins - I once had a case that for some reason the power button would not work so I essentially made the reset button the power button