LG G3 - Black screen w/ Blinking Red & Blue Light Notification - G3 Q&A, Help & Troubleshooting

I was currently on Sprint LG G3 ZV4(rooted) I never messed with TWRP or flashed any custom ROMs, ever.
This morning, I was listening to my music when suddenly the phone stopped working.
When restarting the phone it loads the LG logo then turns to a black screen w/ the notification blue/red light.
How can I fix this? Or do I need a new phone? Also what was the cause to this?

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Hi there,
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