LG G2 acting possesd

[Abbsy97]

I have an LG G2 it is about 1.5 years old. It was originally mine, then my mother's, and now its mine again after I broke my S4. It worked fine for the first couple of weeks and then it started restarting at random, but getting stuck. It would take an act of God to turn back on. Well I finally learned the tricks for getting my phone to power on. (It wouldn't even factory reset for over a month) It still continues to get stuck in bootloop and now the screen goes crazy shaking and jumping, like it was possessed. Does anyone have any ideas? I can provide some pictures if need be.

 

[Me2kuul]

Exactly the same problem I'm having! No help from AT&T or LG.