Here’s how to fix. Hard Reset Your iPhone to Fix iPhone Black Screen of Death. iPhone Black Screen of Death? iPhone X black screen of death is a prominent issue. Locate the Home button and the Sleep/Wake buttons on your iPhone. See the following steps. You can hear the phone ringing, but you cannot pick up the call as the screen remains black. When your iPhone gets a black screen and won't turn on, the first thing to do is to perform a hard reset. 2.1. Step 1. Step 2. How to Fix iPhone Black Screen of Death. This is a very big issue, and it becomes really hard to get access to an iPhone when the screen is black.