MBP 2,16ghz: Doesnt start (Blank screen)

Hi! i've a MBP 2.16ghz core2duo.
My problem is that if i shut it down and then start it again it wont boot.
It will spin up the harddriva and the fans. But it only shows a blank(black) screen.
I've tried the SMC reset and PRAM reset but it doesnt help.
I think it could be a sensor problem or so, because if i let it "cool down" for a while it will start and then i can restart it directly after until it gets warm.
But if i get it to start then i can work in MacOSX for hours and hours without any problem until i restart it, then it wont boot.
And then the same if i let it cool down for a while it will start.
I've checked the temps with "Temperature monitor" and none of them seems very hot.
(theese are idle temps)
Cpu A diode: 46c
CPU Core 1: 44c
CPU core 2: 47c
GFX Processor chip: 42c
GFX heatsink: 44c
Main heatsink1:43c
Main heatsink2: 36c
Memory controller: 46c
Memory sensor: 54c
Smart disk: 35c
I've tried diffrent rams and diffrent slots etc but no change.
Hope anybody can help!
//BR
Patrik from Sweden

I took the non optical drive MBP into Genius Bar at Apple Bridgewater, NJ. The guy was very well trained in how to make a logic board crash seem normal. It was applaudable. Seriously. Really good service. "Mind if I plug this into our system?", "Hmm, Let me try this drive" "Well, it did get on our system, let me run this diagnostic". "Look, your hard drive is there, that's a good sign".
Me "Yes, but what is that red check mark next to power + - 5 volts?"
Him, "Yes, do mind if I take this in the back and look inside?"
Me, "Sure".
On his return," So the inside looks very clean, no problems there but this looks like it might be something that we would like to send to our repair facility in Tennessee. You see, if we put in one part and it doesn't fix it, we'd have to wait for another one. So we like to send these to a place that has all of the parts"
I got it back in 4 days. New logic board, new SSD. Ah, the joys.
Thanks for the responses, especially the SMC info and the PRAM reminder.

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I took the non optical drive MBP into Genius Bar at Apple Bridgewater, NJ. The guy was very well trained in how to make a logic board crash seem normal. It was applaudable. Seriously. Really good service. "Mind if I plug this into our system?", "Hmm, Let me try this drive" "Well, it did get on our system, let me run this diagnostic". "Look, your hard drive is there, that's a good sign".
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Date: Sat, 5 Apr 2014 03:48:29 -0700
From: [email protected]
To: <Removed by Moderator>
Subject: Re: my adobe creative cloud doesnt start correctly it appears a white screen in the my adobe creative cloud doesnt start correctly it appears a white screen in the
    Re: my adobe creative cloud doesnt start correctly it appears a white screen in the
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MBP 2,16ghz: Doesnt start (Blank screen)

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