LG G3 D851 Stuck in a boot loop

So I've had my T-Mobile G3 for less than a year. It will be a year on September 8th, and before I send it off to LG to see if they can do something about it, I want to try to fix it myself. I haven't rooted my phone or anything like that. My phone just, over time, started restarting on its own to the point that it just loops the LG logo (sometimes it manages to make it to the T-Mobile logo). I can only use my phone when its plugged in to the charger. Sometimes it will restart when its plugged into the computer but most of the time it works fine. I have tried factory resetting my phone and now its slightly worse as now the LG logo shows up and immediately shuts off to show it again and thus the cycle continues.

Could someone please help me with this problem? I'm sorry in advance if this is in the wrong place or has already been resolved. I'm new here.