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 causes this issue and how to identify it. This is a common problem on OLED iPhones, especially after drops or previous repairs. Before jumping into a screen replacement, it's important to disconnect and reconnect both the battery and the display first. Sometimes a simple reconnection can fix the issue i