White Vertical Lines on Screen

Help me? My iPhone 5S suddenly turns off and goes on a reboot loop on the logo screen then after the third loop, it frequently have the green and pink lines until it turns white. Sometimes I get the full white screen.

I tried hard resetting it, software restore and even replaced the battery, though not from the official Apple Store because I have to go to a 2-3 hours trip to where there are Apple Stores so I just went to local malls.

I don't think I have dropped the phone or anything but it gets triggered when I open certain apps and the phone slowly heats up.

Can sombody give me a solution or advice? Please and thank you.