iPhone SE touchscreen unresponsive, white stripe on right side

A friend’s kid dropped her IPhone SE and now the touch screen doesn’t work. There is one solid white bar down the right side of the screen. No sign of actual damage, other buttons work fine.

I cracked it open and it did look like the digitizer connection was loose, as was the rear camera (the rubber bracket wasn’t connected). No apparent damage though. Reconnected everything properly, put it all back together and no change.

Any chance there is something else to check that could be loose? I don’t want to replace the screen unless I absolutely have to.