LG G4 will not turn on

[AC Question]

My Lg g4 has been working perfectly until one day when the phone just froze and then turned off. After this I could start it and this thing happend like 3 times, but after this my phone turned off and it would start. What it does it that the LG (life's good) start screen pops up and after some seconds it gets all black and then shows up again. I dont know what to do, please help me.

 

[belodion]

It may be a bootloop, but check first that the battery is making good contact with the contacts.