Hello all, my old 2008 aluminum Macbook has been running hotter and hotter. It had gotten to the point where it would stick between 180-185 degrees shile browsing the internet (with no flash content) with Mail, Chrom, and itunes running. It was too hot to sit on my lap. So I decided to open her up and put on a clean application of Arctic Silver. I put it all back together and it won't boot up. There's no gray apple screen, no chime, no nothin'. The power adaptor works, I believe, because the LED lights up when plugged in to the computer. And the LED battery indicator lights show that the battery is charged. But when I push the power button, absolutely nothing happens. I have tried to reset the SMC with no luck. And as far as I can tell, all the little connectors are properly plugged back in. I get positive feedback when I disconnect them, and then reconnect them. The only two that I'm not sure on are the two small ribbon cables; one for the IR and one for the keyboard. They're tough to tell since they don't snap in. Warranty is long past on the machine. Any suggestions before I bring it to a computer repair place?