iphone – Screen Repair Apple 5c then a line to the screen

I've replaced my screen after having accidentally cracked it. After replacement and ignition, a gray colored stripe extends from the top to the bottom of the screen on the right side of the iPhone. The iPhone works normally but the line is blocking the right side about 8 to 10 mm in width. I separated the iPhone and one of the connectors was not properly installed and was loose. I connected it and the band is still there. Any ideas on what could be damaged, the new screen or the bowels of the iPhone. Thank you in advance. Bob