White bars on black Apple logo screen

Replaced iPhone 5s screen and now on boot-up, the screen begins normally with a white Apple logo on black screen. After about 4 to 5 seconds, white fades into the screen as you can see in the above picture.

Once powered on, there are some vertical lines that clear up pretty quickly and sometimes a white line across the top edge of the screen.

I've reseated the connectors and powered on and off several times. I thought I was pretty careful not to tighten any screws too much.

Any ideas?