White Apple logo screen and black screen are the most common issues we meet when using iPhone.
If you are just in the latter situation, learn 7 solutions to fix
iPhone black screen of death:
Method 1. Restart Your iPhone
Method 2. Connecting iPhone to the Charger
Method 3. Close the Malfunction App
Method 4. Use iOS System Recovery without Data Loss
Method 5. Restore Your iPhone
Method 6. Factory Reset
Method 7. Professional iPhone Repair Service in Apple Store