like white text, certain colors, and it doesn't show up on kik, messages, and other few apps. Any ideas, I got a new lcd and digitizer and the guy said to factory reset the phone and I did but the are still there.
Welcome to Android Central! Which phone? Do they also show up in a screenshot viewed on another device or computer, or are they only visible on that particular screen?
I assume you had someone else do the screen replacement--have you shown the person the problem? Can you ask them to open the phone up again and check all connections?
I wonder how they could tell it wasn't a hardware issue. Could they explain that in detail?
If you take a screenshot of when you see the lines, does that screenshot still show the lines if you view the image on a different device (like on your computer)? If not, then that would more strongly suggest that it's a hardware issue.
It's hard to believe that something like that would be due to software, especially after the screen has been replaced. Either there was a problem with how it was replaced, or the replacement screen itself is defective.