iPhone won't turn on and the screen is black or frozen? After software issue being excluded, the problem may be caused by a faulty logic board. Since logic board of iPhone X is a single one that's basically been folded over and soldered together, the unique design and structure have made any repairs to the logic board far more difficult than previous series. With our iPhone X won't power on repair case today, the fault has been confirmed as inductor damage by voltage measurement. And we can fix the iPhone X won't turn on issue by inductor replacing and board re-soldering. Let's check out the video to see how to fix iPhone X black screen issue.