I have an LG G3 and recently it started having multi coloured lines going down the left half of my screen, as well as white lines going across the bottom half. The phone is encased in an otterbox as well as a stock plastic screen protector. The glass hasn't been cracked or scratched whatsoever, as can be seen in the image. It would be much appreciated if someone could help me figure out exactly what caused this and how to fix it. The phone is only 3-4 months old.