why can't I open my LG ?

[AC Question]

I brought my LG G3 a year and a half ago and it was performing very well with almost no problem suddenly as I turned it on it opened for a few seconds then turned off automatically I tried opening but couldn't I tried charging it sometimes it doesn't charge at all and the others charge till 100% and once I open it it shows the logo screen then it automatically turn off I thought the problem is in the battery but I brought a new one and got the same problem

 

[Golfdriver97]

Welcome to the forums. It sounds like there is a software problem. Did the phone get an update recently?

 

[B. Diddy]

Welcome to Android Central! Are you able to boot into Safe Mode? https://support.t-mobile.com/docs/DOC-30130