If your iPhone screen is completely black but the phone still vibrates, makes sounds, or shows other signs of life, you're likely dealing with a failed OLED display., In this video, I explain what iPhone Won't Stop Vibrating? Here's How to Resolve the Endless Buzzing Phone vibrates but screen is black? Don't bin it it's usually a dead screen, not a dead phone. Would you try to fix it or just upgrade? iPhone X Black Screen But Still On? 7 Solutions!