LG Optimus F5 — LG G Flex 2 won't turn on?

Hello, my LG G Flex 2 won't turn on after pressing Shutdown and restart. The screen went black after it had shut down and won't turn on. I've tried a hard reset with no luck. The strange thing about this is that the WiFi hotspot was turned on when I restarted it, and the WiFi network can still be seen by other devices, and can be connected to, but it gives no internet access.