Hi,

Lately when I press the power button on my pro it will make a click sound, there will be a brief surge of power(the room lights always flicker when it starts up), but then I will hear another click and the computer fails to start. So far I can eventually get it to start(and have just been leaving it on lately, but I don't like doing that and it isn't always an option), but it can take many attempts and is getting worse. This occurred out of nowhere and I have no problems when it is running.I've reset the SMC and it doesn't help. Apple hardware test detects nothing.Is there a way to tell if it is an issue the power button, its circuit board, or the power supply? Is it something else?The is only one Apple store in my state and it is not close.Early 2009 MacPro, 2xQuad Core 2.26 Ghz, 10.6.8, 8 GB RAM, ATI Radeon HD 4870.

Any help will be apprecited.

I didn't find the right solution from the Internet.

References:
[arstechnica.com]
Animated market intelligence video

Thank you.