I was so so so so careful when lifting the logic board past the flex cable on the power button. Before final assembly, plugged it all in to test and it booted OK. LCD and Digitizer worked. Went to power it off and found the power button wouldn't work. Sure enough, the tiny (<0.5mm) strip of copper in that power flex cable had torn right through. About to pitch this rotten, stinking thing across the back yard into the trees. I've spent 5 hours of my life fixing this today! Aaargh!!!!!