When I plug my iPhone in I can hear the sound that it is charging but the screen is just black
I have a iPhone 7 and the screen is cracked a little bit, but when I plug it in I can hear the sound that it is charging but the screen is just black. There is a little line of light at the very top of the screen where I can see the time and wifi bars, but that's it. Then when I click the home button these weird and different color lines come up on the screen! What should I do? Please help. Thank you.
[Re-Titled by Moderator]
