Galaxy Z Flip 5 black line on screen & flicker cannot access device

[Flyhigh]

My Galaxy Z Flip 5 has developed a black line at the center fold place, also it keeps operating by itself & not able to even enter the unlock code.  Looks like some software malfunction.  Please check 

 

[Glenntech]

It looks like the screen needs replacing.
If you can, dial *#0*# into your phone keypad
At the top will be 3 different colour test cards
If the black area dissappear. Then it's likely an app or theme causing the problem
If the black area remains, then you will have to look at booking in the phone for a repair

[IKG]

The screen has failed at the hinge that has caused damage to the digitizer preventing you from accessing the touch. It need to go back to samsung for replacement asap

[lurvie]

My phone had a line in the middle and I can't type on the right screen if it is opened,only type when flip is closed