Hi Guys, Any one encounter this problem. when i press the power button on my mac pro it will not turn on. It makes the clicking sound but still nothing. Then i press it again then nothing. The third time it turns on. I will be taking it to the apple store this Friday since it is cover under apple care until 2014. Any advice on this problem. It sucks, also let say, i will power it on and then leave without login in. When i come back i press any button to wake it up and nothing shows on my display still saying no signal detected but mac pro is already awake. The video card is ATi Radeon 5770 that i am using. So far it is frustating to shutdown when nothing is coming up on screen.