Last night while using my LG G3 (with over 40% battery) the phone turned itself off and will not power back on. If I remove the battery and replace it, the phone will power up and show the LG logo and the Verizon screen (sometimes) but nothing further. It charges and if I remove and replace the battery the screen will show the normal battery level screen, however, after a failed power on, nothing will happen again until I remove the battery and restart the process. I have tried booting in recovery mode with no success. Anything else I can try before going through the warranty process?