Chosen Solution
Previously I asked a question concerning replacing the screen and LCD on my iPhone. I had leaned into something with no actual impact, just pressure from me leaning, and when I looked at my phone the screen was black. I came home and replaced the screen with the old screen that was previously broken (the LCD still worked when I bought the new screen, but my current screen was cracked real bad which is why i bought a new one) but that screen would only light up long enough to show a few white lines on a black screen. So it was suggested to me that I get a new screen before deciding how much damage was done to the phone. I now have a working screen, but my phone won’t turn on! I toggled the vibrating button to see if it was on and that maybe I yet again put on a faulty LCD, but alas, no vibration. I also tried to hold the power button for about 15 seconds. It wasn’t plugged in for several days, but now it’s been charging for 3 hours. At the time that I leaned into something and the screen cracked, the phone was still on. It would also still vibrate when I toggled the ringer. I had to finally use muscle memory and turn the phone off because the back light was staying on but the screen was black. Since the phone was staying on after my accident I thought having a new screen would fix all my problems.. Is there anything else I could try or should I just leave it to the professionals?
It’s possible that you damaged the logic board. Remove the screen assembly entirely and connect the phone to an iTunes enabled computer. If the phone boots properly, it will be recognized by iTunes. If you don’t have a passcode or have previously “trusted” that computer, you will even be able to sync the data. In that case, a known-good screen should work unless the backlight or LCD circuit was damaged. If iTunes does not recognize the phone or if there is an apparent backlight/LCD circuit issue, then you have a logic board issue that will require a trip to an experienced micro-solderer.
