Sounds and Vibration stuck switch back to "Silent" for phone and all notifications : r GalaxyFold Here's Why You Hear Your Phone BuzzEven Though It Actually Hasn't Observer 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 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?