iPhone 6s screen issue

[kateboban]

So I replaced screen and digitizer on a 6s, screen appears perfect but when on a black background screen all lines are coming down screen. How do i fix this ?

Examples below,
any help would be appreciated

 

[Minho]

So I replaced screen and digitizer on a 6s, screen appears perfect but when on a black background screen all lines are coming down screen. How do i fix this ?

Examples below,
any help would be appreciated

No pictures are attached...

 

[Audit13]

If the replacement was done by a third party, I recommend taking it back to the third party for diagnosis.

If you performed the replacement, it's possible that the replacement screen is defective.