I tried fixing the power button, but it doesn't click. It sits very soft on the top...I can't figure out anything missing. When i reassembled and plugged in, phone just keeps flashing apple symbol but doesn't turn on at all. This could be due to the fact that power button is not clicking...

Attempt 2: I thought of replacing the whole ribbon, ordered and tried installing. I was successful installing it, but the vibrate/silent button part isn't properly installed, nevertheless, power button is still the same. I had thought that circuit button that connects to the power button had worn out, so decided to change so that power button would click. It doesn't click now. I am stuck, now I am thinking of resorting to some fix by the pros..........this totally sucks!! I wouldn't suggest anyone trying this.