How can I fix a black screen with a red line through the center?

[AC Question]

Black screen with red line through the center

my son has a motorola maxx hd. he was changing a tire and laid down on the ground with his phone in his pocket in an otterbox. now the screen in black with a red line through the middle of it. Help!!We have turned the phone off and back on and screen is still black with line through it