Hi. Welcome to justanswer.
Can you please tell me if the screen problem is there only on the home screen or on every screen?
Have you tried resetting the phone to factory defaults?
First try to boot your phone in safe mode.
Press the power button as if you were switching off the phone. When the option of Power off appears on your home screen, Press and hold the power off and you will get an option to reboot in safe mode. Try that an check if the problem is still there.
Let me know when you reach home so that we can proceed further.
Hi, How did things turn out?