Case 1: "My iPhone 7 Plus screen goes black and won't turn on after it was dropped. Though the screen is black but the phone is on cause it still rings when somebody call. How to fix iPhone black screen of death?"
iPhone screen goes black when the phone comes across a critical system error which can cause the system to shut down. Since the iPhone or iPad screen is unresponsive and black like the phone is dead, the black screen error is also called iPhone black screen of death or iPad black screen of death. Below are 4 solutions to fix iPhone 6s/6 Plus/7/7/Plus/8, iPhone X/11/12 stuck on black screen.
There are mainly two kinds of reasons why your iPhone screen is black and won't turn on. Firstly, your iPhone could have black screen of death because of a hardware problem, for example, your phone screen is broken or damaged after the device is dropped or water damaged.
If black screen of death on your iPhone is a result of hardware damage, you should take the phone to Apple Store. But if it is software-related, here are 4 solutions to fix black screen on iPhone 5/6/7/8/X in iOS 11.4 or earlier.
Step 2 In some cases, iTunes will detect that your iPhone is in recovery mode and show the below window. If iTunes couldn't recognize your iPhone, hold the power button + the home button on iPhone until the following message pops up.
However, the iTunes solution doesn't work for some users. When trying to fix black screen with iTunes, some users get a new problem: iPhone is stuck in recovery mode (opens new window), iTunes couldn't recognize your iPhone (opens new window) and throws error 9, error 4013 (opens new window), etc. Luckily, there is another solution for iPhone black screen of death without iTunes.
Better than iTunes, the program can fix iPhone black screen without erasing data on your device. It works on iPhone 5/5s/5c, iPhone 6/6s/6s Plus, iPhone 7/7 Plus, iPhone 8/8 Plus, iPhone X/XS/XR/11 in black screen.
Next connect iPhone in black screen to PC via USB cable. The program will detect your device. If your iPhone can be detected, please choose "Free Quick Fix" to repair your phone. If you cannot select such mode, move on to the next.
If your iPhone screen turns black after screen replacement or after the phone has been dropped/ water-damaged, the black screen of death is probably caused by hardware damage, especially when the iPhone screen is black but the phone is still on.
If you fail to fix iPhone black screen with the above methods or iPhone screen went black but the phone still works, you should get iPhone screen repair service from the local store. If your iPhone is still under warranty or under AppleCare plan, take the phone to local Apple store to get help.