MacBook :: Not Booting Without Pressure?

I posted a while back with my macbook not working, with the disc spinning, steady sleep light, but no chime and black screen.well since then I took out screws and had a look at the logic board,tightened all the loose screws,and pulled this metal fabric wire through the screw by the disc drive, it was loose and torn.

And after waiting, it turned on!But I still got shut off abruptly, distorted screens, kernel panics, and force restart messages.Then it wouldn't boot up at all without pressure near the power button.That worked for a while, then it would turn off.Then pressure had to be applied elsewhere to get it to turn on.I have pressed on the flat rest above the harddrive, the opposite side of the power button, everywhere.re there screws that I shouldn't have tightened? Is there something wrong with that fabric metal thing?Another issue is that there has been overheating, and I'm sure power offs due to overheating, and I know the fan is running, but still getting too hot.