my phone turns on but then turns off

[AC Question]

i have my lg g3 for 1 year and a half, and suddenly i saw that my phone gets in a loop. it turns on and make ut to the lock screen but then after like 5 seconds it turns off again and immediatley turns on again.... i've tried a different battery but it still happened.

 

[belodion]

That may need repair. See the bootloop threads in the G3 forum, to which I'll move this.