Hello. Ahead sorry for my English. Last week I was replacing my back camera cause I had pretty bad floaters when I was shooting some photos. I did it by one tutorial on youtube. When I put together my iPhone I could not turn it on. The power button doesn't work. I plug it into my computer and it turned on. Okay, I thought something bad with power button or flex cable. Today I replace flex and button and still won't turn on. Is any chance I broked something in mainboard? I don't understand why the power button doesn't work. Thank you very much! I am frustrated of it.