I had a cracked screen but the phone was otherwise working perfectly. I replaced the entire front panel per the directions and video. Now when I try to turn the phone on, NOTHING happens. The phone won't turn on anymore. I wondered if the front panel I was sent was faulty so I tried to reinstall the old cracked screen and it still would not turn on (that screen previously worked fine). I tried to plug it in and press the home and power buttons simultaneously but nada! Also tried plugging it into iTunes and that didn't work either. All the ribbon cables seem to be intact and fine. I was not particularly traumatic when I was opening the phone. Please HELP!