Problem Help, Phone screen is permanently stuck on logo.


My phone is Samsung Galaxy S4 GT-I9505, today I was on Youtube watching a video and suddenly the phone and the image froze, I stayed for a while and you could see some very thin lines, most likely pixels or something and then it suddenly closed. I opened it or it opened and got stuck on the image with Samsung and S4.
What can i do? I took out the battery, put it back, put it on charge, whatever, it does the same.
If I keep it charged, it will remain stuck on the battery image.
Please, I'm asking for your help!!!