Z3C backlight problem (dim display)

Hi guys so the screen suddenly went dim and brightness wont work, opened up the back and used some pressure on the digitizer flex connector as you can see in the video here.
https://www.youtube.com/watch?v=ZGPkFp4Aphs
Now i'm wondering who's at fault and don't know if ordering a new display will solve the issue.:confused:
What do you guys think?